Chinese tech company EHang Holdings Limited has begun to sell its self-developed unmanned electric vertical take-off and landing (eVTOL) aircraft EH216-S on Chinese e-commerce platform Taobao at a cost of 2.39 million yuan ($332,032) per unit, the Global Times observed on Monday.
He Tianxing, a deputy president of EHang, told the Global Times that it was not only for online sale, but also aimed to inform the public the development potential of low-altitude economy in the future.
The EH216-S last December obtained the standard Airworthiness Certificate from the Civil Aviation Administration of China, which marked the eVTOL aircraft becoming eligible for commercial operation.
EH216-S Passenger-Carrying UAV System Obtains Standard Airworthiness Certificate from CAAC and the Certified Aircraft Delivered to Customer in Guangzhou.
Aside from its main selling points including its small size, easy take-off, landing and re-charge ability, as well as quietness, EHang made multiple backups for core parts such as propellers, electric engine, flying control system and batteries.
The Government Work Report released during the recently concluded two sessions earlier this month stated that China will foster new growth engines in fields such as biomanufacturing, commercial spaceflight, and the low-altitude economy.
Analysts pointed out that low-altitude transport can help reduce waste once ground transport has reached its limit in megacities.
Following the announced policy, many cities have taken measures to develop the sector. As the country's first trial province for low-altitude air space management, Southwest China's Sichuan Province simplified low-altitude flight test applications. East China's Anhui also crafted rules to develop low-altitude economy, stating to accelerate the development of the industry in Hefei and Wuhu, two major cities there.
In addition, Shenzhen city in South China's Guangdong Province has published a set of documents and government regulations supporting the development of the low-altitude economy in the province, according to Xinhua News Agency.
As of 2025, the output value of low-altitude economy in China is estimated to reach 3 to 5 trillion yuan, according to a recent survey by the International Digital Economy Academy.
In his first public appearance before media since taking his new post, Wu Qing, head of China's securities watchdog, outlined on Wednesday his plan to ensure the stable development of the capital market, the world's second largest, and vowed to beef up institutional buildup and to better ensure investor protection.
Chinese analysts noted that the institutional and holistic approach outlined by the head of China Securities Regulatory Commission (CSRC), who takes a harsh tone on illegal behavior while being considerate to small investors, is a pragmatic approach that suits the market reality, and is set to boost market confidence, stabilize expectations and shore up the overall investment value of China's capital market.
A number of delegates to the ongoing two sessions also contributed their thoughts on the topic, which is under the global media spotlight and has become a target for Western doomsayers in recent weeks.
Wu's appearance at the press conference, held during the ongoing two sessions, along with several other top government officials in charge of China's economic and trade affairs, is one of the highlights of the political event, as ensuring the stability of the capital market was mentioned in the Government Work Report for the first time following a period of turbulence in the Chinese A-share market ahead of China's Spring Festival holidays in February.
The Government Work Report, delivered by Chinese Premier Li Qiang on Tuesday at the opening meeting of the second session of the 14th National People's Congress, set a growth target of around 5 percent for the country's economy in 2024.
Notably, the report pointed out that "the underlying stability of the capital market should be enhanced."
Giving his insight on how to ensure the stable development of the capital market, Wu the CSRC chairman, who is one day short of completing his first month in the new post, said enhancing institutional buildup and attracting long-term investment into the market will be among the measures to be taken to accomplish the task outlined in the Government Work Report.
Acknowledging that market operation has its own rules and should not be interfered with under normal circumstances, Wu told the press conference that the regulator "won't hesitate to act to correct extreme situations when the market seriously deviates from its fundamentals, irrational and violent fluctuations occur, liquidity is exhausted, market panic occurs and serious draining of confidence appears."
The first-time ever mentioning of enhancing the underlying stability of the capital market sends a strong signal of China's commitment to building itself into a financial powerhouse and sets the tone for the future development in related fields, delegates to the two sessions said.
Outside of the two sessions venue, Chinese scholars also shared their views on what Wu had said at the press conference.
Dong Shaopeng, a senior research fellow at the Chongyang Institute for Financial Studies at Renmin University of China, told the Global Times on Wednesday that the announcement made by CSRC chairman Wu, with an emphasis on both strength and toughness, laid out a clear-cut vision on improving the construction of fundamental institutions and better regulating the capital market, and is a "pragmatic approach in line with reality."
"The dual emphasis by the CSRC on strengthening regulation and bolstering investor protection are set to improve the stability and quality of the Chinese capital market," Dong noted.
Dong said that the emphasis on protecting small and medium-sized investors addresses the root of the problem facing China's capital market, as their ranks formed the ultimate source of long-term funding for the Chinese A-share market.
The stock market has drawn much attention during this year's two sessions, with members, legislators, and officials putting forward practical and broad-perspective suggestions and motions on stabilizing the capital market, Xi Junyang, a professor at the Shanghai University of Finance and Economics, told the Global Times on Wednesday.
Wu's remarks at the press conference will be heard by both domestic and overseas investors, Xi Junyang noted. "And his remarks, including protecting investors' interests, lifting the quality of listed companies, and implementing a stricter delisting system, are conducive to boosting investor confidence and the overall investment value of China's capital market."
"We can expect proactive measures to be announced in these areas," Xi Junyang said.
The Government Work Report set priorities and the direction for this year's economic work, and also offers much-needed reassurance to the capital market, Yang Delong, chief economist at Shenzhen-based First Seafront Fund Management Co, told the Global Times on Wednesday.
"The stock market is a barometer of a country's economy," Yang said. "Stepped-up macro-policies and stable economic recovery will contribute to a rebound in the A-share market."
A note of reassurance
With the sound development of the capital market a matter of vital concern, delegates to the two sessions are also contributing their ideas, with some pointing out that the Government Work Report has brought "a certain sense of reassurance to the market."
"The Chinese equities market was on a turbulent ride at the beginning of 2024, so the statement in the Government Work Report gives investors a sense of encouragement as well as a certain sense of reassurance," Fang Jie, a member of the National Committee of the Chinese People's Political Consultative Conference (CPPCC) and president of Hubei University of Economics, told the Global Times on Wednesday.
There is a lot of work to be done to improve the underlying stability of the capital market and ensure its sound development, and first and foremost is to continue shoring up the macroeconomy, which provides a foundation for market performance, noted Fang, who has also served as the deputy secretary general of Wuhan government in Central China's Hubei Province and the director of the Wuhan Financial Work Bureau.
Chinese financial authorities also need to further carry out sweeping market reforms, such as creating more innovative capital market products to help release market vigor, and improve the systemic design of the capital market through measures such as increasing the transparency of listed companies' information disclosure and carrying out holistic supervision over the A-share market, Fang said.
Yang Chengzhang, a member of the National Committee of the CPPCC and chief economist with Shenwan Hongyuan Securities, told the Global Times on Wednesday that in order to ensure the stable development of the capital market, the government should also continuously put efforts and resources into stemming risks in the property sector, local debt and small and medium-sized financial institutions, as these three sectors are major sources of concern for capital market investors in 2023.
The Government Work Report's call to tackle risks in key areas and beef up security in key sectors will help ease excessive worries and curb the pessimistic outlook in the market, according to Yang Chengzhang.
In order to promote the sound development of the capital market and protect investors' rights and interests, the CSRC has held symposiums to solicit opinions and suggestions on improving the basic system of the capital market, strengthening the protection of the rule of law, and it has also paid visits to listed firms to help them address difficulties to achieve high-quality development.
Since Wu took office, the Chinese A-share market has recovered much of its losses from the recent cycle, finishing at 3,039.93 points at the Shanghai bourse and 9,395.65 points at the Shenzhen bourse on Wednesday.
Following robust travel and tourism activity during the eight-day Spring Festival holidays, the Chinese economy is off to a good start.
Preliminary economic indicators suggest that China is poised to achieve a good start in the first quarter, Zheng Shanjie, head of the National Development and Reform Commission, the country's top economic planner, said at the same press conference.
Zheng revealed that industrial power use grew at 9.7 percent in the January-February period, exports are likely to grow 10 percent year-on-year, indicating robustness in the economy.
Back in 2004, archaeologists excavated two pits in northern China that looked a lot like homebrewing operations. Constructed between 3400 and 2900 B.C. by the Yangshao culture, each pit contained the remnants of a stove and assorted funnels, pots and amphorae.
Now, Jiajing Wang of Stanford University and colleagues report that the pottery shards contain residue and other evidence of starches, chemicals and plant minerals from specific fermented grains. The ancient beer recipe included broomcorn millet, barley, Job’s tears and tubers — that probably gave the beer a sweet flavor, the team writes May 23 in the Proceedings of the National Academy of Sciences.
The findings predate the earliest evidence of barley in China by around 1,000 years. Beer may have been consumed at social gatherings, and brewing, not agriculture, spurred the introduction of barley to China, the researchers argue.
Climate commotion In “Changing Climate: 10 years after An Inconvenient Truth” (SN: 4/16/16, p. 22), Thomas Sumner reported on the progress scientists have made revising forecasts of the far-reaching effects of climate change — from extreme temperatures and sea level rise to severe drought and human conflict — in the decade since the Oscar-winning film’s release.
Reader response to the article was overwhelming, with hundreds of online comments. Some people enjoyed the in-depth look at climate change science, while others expressed skepticism about humans’ contribution to climate change and a general distrust of climate scientists.
“One of my goals for this article was to highlight that climate change research has itself changed over the last decade,” Sumner says. Scientists are still working to understand how the consequences of atmospheric warming will play out in the coming centuries. But one big message from the last decade of research is that the fundamentals have held up: Natural variability exists, says Sumner, but human activities are largely responsible for the current warming trend. “The question now is what impact will human contributions have down the line and what should we do to prevent and mitigate those effects,” he says. Plastic feast Sarah Schwartz wrote about the discovery of a microbe, Ideonella sakaiensis, that chows down on a hard-to-degrade polymer in “This microbe makes a meal of plastic” (SN: 4/16/16, p. 5). Online commenters were amazed by this new plastic-gobbling organism. “This is great news,” Dan said. “Our world would be doomed if there wasn’t a microbe able to do this.” Chuckawobbly wondered how long it takes I. sakaiensis to digest the plastic. And Jean Harlow was concerned about the potential by-products of worldwide plastic digestion. “The waste product would be a significant amount … of what?” she asked.
Researchers observed that I. sakaiensis almost completely degraded a thin film of polyethylene terephthalate, or PET, after six weeks in a laboratory. But when extracted from the bacterium, the proteins used to break down plastic begin working in about 18 hours.
I. sakaiensisappears to break PET into smaller molecules, like amino acids and carbon dioxide, says coauthor Kenji Miyamoto of Keio University in Yokohama, Japan. But it would probably be hard for the microbe to break down plastic in the outdoors because of its specific growth requirements, he says. Miyamoto envisions that it could be possible to use the specialized proteins in a closed environment to break PET down into molecules such as terephthalic acid— one of the plastic’s main building blocks, which seems benign in the environment.
Prairie dog predators Herbivorous prairie dog mothers routinely kill baby ground squirrels that encroach on their territories, researchers found. Competition for resources may be a contributing factor to the killings, Susan Milius reported in “Killer prairie dogs make good moms” (SN: 4/16/16, p. 14).
One reader had other ideas. Audrey Boag wondered if prairie dog moms kill ground squirrels to protect their pups from predation or from diseases carried by the squirrels. “In either case, minimizing the number of ground squirrels would pay in lifetime biological fitness,” she wrote.
“We never observed a ground squirrel kill or injure an adult or juvenile prairie dog,” says study coauthor John Hoogland. “Perhaps such attacks sometimes occur underground.” Hoogland notes that the majority of ground squirrels killed by prairie dogs were juveniles, which are too small to be a threat.
One threat, however, is a species of disease-carrying flea that infests both animals. Hoogland found that prairie dog killers and their offspring had fewer fleas than nonkillers and their offspring, “but this trend was not significant,” he says.
Plastic cling wrap with nano-sized pores could give “cool clothes” a new meaning.
The material lets heat escape, instead of trapping it like traditional fabrics, Stanford University materials scientist Yi Cui and colleagues report in the Sept. 2 Science. It could help people keep cool in hot weather, Cui says, and even save energy by reducing the use of air conditioning.
“It’s a very bold new idea,” says MIT physicist Svetlana Boriskina, who wrote an accompanying commentary. Demand for the new material could be far-reaching, she says. “Every person who wears clothes could be a potential user of this product.” Current cooling devices include wearable fans and wicking fabrics; both rely on evaporation to cool human skin. But skin also sheds heat in another way — as infrared radiation. Clothing holds this heat close to the body, Cui says. If infrared radiation could instead pass through fabric, he reasoned, people would feel a lot cooler.
But the fabric would have to be transparent only to infrared wavelengths. To visible light, it would need to be opaque. Otherwise, the clothing would be see-through.
Cui found just one material that satisfied both requirements: a commercially available plastic used in lithium-ion batteries. The material, called nanoporous polyethylene, or nanoPE, is a cling wrap‒like plastic that lets infrared radiation through. But unlike cling wrap, the material isn’t clear: It blocks visible light.
Tiny pores speckled throughout the fabric act as obstacles to visible light, Boriskina says. When blue light, for example, hits the pores, it scatters. So do other colors. The light “bounces around in different directions and scrambles together,” she says. To human eyes, the resulting color is white.
The pores scatter visible light because they’re both in the same size range: The diameters of the pores span 50 to 1,000 nanometers, and the wavelengths of visible light range from 400 to 700 nanometers. Infrared light emitted by the body has a much larger wavelength, 7,000 to 14,000 nanometers, so the plastic’s tiny pores can’t block it. To infrared light, the pores are barely bumps in the road, not barriers. The pores are kind of like small rocks at a beach, Boriskina says. They’ll interfere with the motion of small waves, but big waves will wash right over.
Cui and colleagues tested nanoPE by laying it on a hot plate warmed up to human skin temperature — 33.5° Celsius. NanoPE raised the “skin” temperature by just 0.8 degrees(to 34.3° C). “But when you put on cotton, my God, it rose to 37,” Cui says. “It’s hot!”
The researchers also tried to make nanoPE more wearable than plastic wrap. They coated it with a water-wicking chemical, punched holes in it to make it breathable, and layered it with cotton mesh. Now, the team is working on weaving the fabric to make it feel more like traditional textiles.
“Within five years, I hope someone will start wearing it,” Cui says. “And within 10 years, I hope most people will be wearing it.”
Researchers have digitally unwrapped and read an ancient Hebrew scroll that’s so charred it can’t be touched without falling apart. It turns out the document contains the oldest known Biblical text outside of the roughly 2,000-year-old Dead Sea Scrolls, the investigators say.
Archaeologists discovered the scroll’s remnants in a synagogue’s holy ark during a 1970 excavation in Israel of En-Gedi, a Jewish community destroyed by fire around 600.
In a series of digital steps, slices from a 3-D scan of the En-Gedi scroll were analyzed to bring letters and words into relief on a pieced-together, virtual page. Those images revealed passages from the book of Leviticus written in ink on the scroll’s disintegrating sheets. Radiocarbon results date the scroll to approximately 300, making it the earliest copy of an Old Testament book ever found in a holy ark, scientists report September 21 in Science Advances.
This computerized recovery and conservation process can now be used to retrieve other ancient documents “from the brink of oblivion,” the researchers say.
DENVER — A period of skyrocketing global temperatures started with a bang, new research suggests.
Impact debris and evidence of widespread wildfires around eastern North America suggest that a large space rock whacked Earth around 56 million years ago at the beginning of the Paleocene-Eocene Thermal Maximum, also known as the PETM, a period of rapid warming and huge increases in carbon dioxide. The event is one of the closest historic analogs to modern global warming and is used to improve predictions of how Earth’s climate and ecosystems will fare in the coming decades. Too little is known about the newfound impact to guess its origin, size or effect on the global climate, said geochemist Morgan Schaller of Rensselaer Polytechnic Institute in Troy, N.Y. But it fits in with the long-standing and controversial proposal that a comet impact caused the PETM. “The timing is nothing short of remarkable,” said Schaller, who presented the discovery September 27 at the Geological Society of America’s annual meeting.
The impact may have contributed to the rapid rise in CO2 by stirring carbon up into the atmosphere, but it was hardly the sole cause, said Sandra Kirtland Turner, a geochemist at the University of California, Riverside. Her own environmental simulations suggest that the influx of carbon that flooded Earth during the PETM probably took place over at least 2,500 years, far too drawn out to be caused by a single event, she said at the same meeting.
During the PETM, a massive influx of carbon flooded the atmosphere (SN: 5/30/15, p. 15) and Earth warmed by 5 to 8 degrees Celsius to temperatures much hotter than today. That carbon dump altered the relative abundance of different carbon isotopes in the atmosphere and oceans, leaving a signal in the sedimentary record.
While searching for that signal in roughly 56-million-year-old sediments from sites up and down the U.S. East Coast, Schaller spotted microscopic glassy spheres about the size of a dust mite. These specks resemble those blasted from previously identified large impact events. After switching from a black to a white sorting tray to more easily see the black debris, one of Schaller’s Rensselaer colleagues, micropaleontologist Megan Fung, discovered abundant charcoal pieces in the mix. That charcoal formed when wildfires sparked by the impact raged across the landscape, she proposed.
More evidence of the impact will help researchers to better constrain its location, scope and possible relationship to the start of the PETM, Schaller said.
Two more teeny moons might be lurking around Uranus. That’s in addition to the 27 we already know about. Fluctuations in the density of two of the planet’s dark rings, seen in radio data from the 1986 flyby of the Voyager 2 spacecraft, could be caused by unseen moonlets, Robert Chancia and Matthew Hedman, astronomers at the University of Idaho in Moscow, report online October 9 at arXiv.org.
At probably just 4 to 14 kilometers wide, both moons would be very difficult to detect in Voyager 2 images, the researchers report. New observations with ground-based telescopes might have better luck.
Traffic jams in the brain’s blood supply may play a role in Alzheimer’s disease. A new online game turns people at home into amateur traffic cops. This policing, which involves spotting hard-to-see sluggishness in tiny capillaries in mice, may ultimately help scientists better understand, and perhaps even treat, Alzheimer’s, a devastating disorder that affects over 5 million Americans.
The science behind the game, called Stall Catchers, comes from Cornell University. Chris Schaffer, Nozomi Nishimura and colleagues found that mice designed to exhibit symptoms similar to Alzheimer’s have more blocked blood vessels in their brains than regular mice. That difference can deprive the brain of sustenance and may be a key to understanding how Alzheimer’s damages the brain, the researchers suspect. But finding congested capillaries is a slog. Computers haven’t been up to snuff, and experts could spend an entire year analyzing the thousands of microscope images needed to amass enough data to explore links between Alzheimer’s and blocked vessels. “I thought, if we could change that, it would be tremendous,” says Pietro Michelucci, director of the Human Computation Institute in Fairfax, Va. The institute is a nonprofit organization that runs the EyesOnALZ program, which aims to crowdsource Alzheimer’s research.
That’s where StallCatchers.com comes in. The website asks players to sift through short black-and-white videos of real mouse brains, on the prowl for blocked blood vessels. In the videos, moving blood appears white. But stationary black segments that appear between two white segments signal trouble — a stall. Players rack up points and ascend levels as they classify vessels. With practice, the task gets easier. And people who suffer from performance anxiety shouldn’t fret; each video will be scrutinized by multiple users to get the final verdict. With a little help from the crowd, “not only do [researchers] get answers faster, but they can ask more questions,” Michelucci says.
So far, nearly 1,000 users have played Stall Catchers, Michelucci says. Those players are beginning to generate data that will let researchers see how good these amateur traffic cops are. With luck, their eyes will help unstall the fight against Alzheimer’s.
A “three-parent baby” was born in April, the world’s first reported birth from a controversial technique designed to prevent mitochondrial diseases from passing from mother to child.
“As far as we can tell, the baby is normal and free of disease,” says Andrew R. La Barbera, chief scientific officer of the American Society for Reproductive Medicine. “This demonstrates that, in point of fact, the procedure works.”
The baby boy carries DNA not only from his mother and father but also from an egg donor, raising both safety and ethical concerns. In particular, people worry that alterations of the genetic makeup of future generations won’t stop with preventing diseases but could lead to genetically enhanced “designer babies.” Opponents, such as Marcy Darnovsky, executive director of the Center for Genetics and Society in Berkeley, Calif., are also worried that the technique hasn’t been fully tested. “We wish the baby and family well, and hope the baby stays healthy,” Darnovsky says. “But I have a lot of concerns about this child and about future efforts to use these techniques before they’ve been shown to be safe.”
About one in 4,000 children are born with dysfunctional mitochondria. These energy-generating organelles are inherited from the mother and have their own DNA. Mutations in some of the 37 mitochondrial genes can lead to fatal diseases, often affecting energy-hungry organs such as the brain and muscles. Because there is no cure or effective treatment for many mitochondrial diseases, the recent birth has been heralded as a sign of new hope for affected families.
Even if women don’t have mitochondrial diseases themselves, they can pass the diseases to their children if their egg cells contain large numbers of defective mitochondria. The mother of the recent three-parent baby had previously had two children who died of Leigh syndrome, a mitochondrial disease that affects the nervous system and eventually prevents a person from breathing.
Fertility doctor John Zhang of the New Hope Fertility Center in New York City and colleagues performed what’s called a spindle transfer to put all the chromosomes from the mother’s egg into a donor egg that contained healthy mitochondria but had been emptied of its chromosomes (SN Online: 10/18/16). The egg was then fertilized with sperm and implanted in the mother.
Cell swap A baby boy born in April has DNA from three people. To produce the embryo, researchers transferred the chromosomes from the mother’s egg into a donor egg with healthy mitochondria. The technique is called “spindle transfer” for the cellular structure that segregates the chromosomes.
“It’s very important that they follow up,” to monitor the child’s long-term health, says Shoukhrat Mitalipov, a mitochondrial biologist at Oregon Health & Science University in Portland. Mitalipov pioneered the spindle transfer technique in monkeys (SN: 9/26/09, p. 8). Even a small number of defective mitochondria carried over from the mother’s egg may replicate and cause problems later on, he and other scientists have found (SN: 6/25/16, p. 8; SN Online: 11/30/16).
Zhang reported that just 1.6 percent of the baby boy’s mitochondrial DNA came from his mother (SN Online: 10/19/16). Mitalipov notes, however, that doctors can’t know from sampling a few types of tissue whether other tissues have different levels of mitochondrial carryover. What’s more, levels of mutant mitochondria may change as the child grows.
Mitalipov supports research on the technique but says it should be done in carefully controlled clinical trials. Results of a mouse study published in July suggest that mismatches between the parents’ nuclear DNA and the donor mitochondrial DNA could affect metabolism and aging (SN: 8/6/16, p. 8). Those effects could show up years or decades after birth.
The baby boy born in April is technically not the first three-parent baby. At least two children born in the late 1990s carry mitochondrial DNA from a donor. Those two and 15 other children were born to mothers who had a small amount of cytoplasm — the gelatinous fluid that fills cells and holds mitochondria — from a donor egg injected into their own eggs in an effort to improve results of in vitro fertilization. No major health problems have been reported, but the studies were abandoned because of ethical concerns, lack of funding and the difficulties in obtaining newly required permits.
La Barbera disputes the term “three-parent baby” entirely. “A person’s essence as a human being comes from their nuclear genetic material, not their mitochondrial genetic material,” La Barbera says. Children who are born after mitochondrial transfer procedures have only two parents, he contends.
Zhang drew fire for going to Mexico to perform the procedure. Congress currently bars the U.S. Food and Drug Administration from reviewing applications to make heritable changes in human embryos, which includes the spindle transfer technique. A panel of experts said in February that it is ethical to make three-parent baby boys (SN Online: 2/3/16), a provision that would prevent future generations from inheriting the donor mitochondria. Because mothers pass mitochondria on to their babies but fathers usually do not, technically baby boys born through this technique don’t carry an inheritable modification in their DNA.
Clinics in the United Kingdom can legally perform the procedures, but none have been reported yet. A panel of experts there recommended November 30 that clinical studies could move ahead, so more babies may be born in 2017.
