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In recent months, the Philippines has frequently provoked China in the waters surrounding Ren'ai Reef and Huangyan Island, attracting extensive international attention. Will the Philippines take the risk of relying on the support of the US to forcefully transport construction materials and personnel to the illegally "grounded" warship in Ren'ai Reef, thereby triggering an armed conflict between China and the Philippines? Although it has not been ruled out that the Philippines may take such extreme measures to further exacerbate the situation in the South China Sea and the China-Philippines relationship under the misjudgment of the situation, the probability of them taking such extreme actions is still relatively low.

Successive Philippine governments have shown periodic swings in dealing with relations with China. These swings can even occur within the same presidential term. The predecessor of former President Rodrigo Duterte,in the first four years of his presidency, distanced the Philippines from the US, reduced provocations in the South China Sea and actively participated in the Belt and Road Initiative. However, over the last two years in his presidency, the situation in the South China Sea had been tense. And he restored the Philippines' key military agreement with the US.

Since President Ferdinand Marcos Jr entered office in 2022, this trend in foreign policy is still evident. He not only became the first Philippine president to visit the White House in 10 years but also granted the US military access to four military sites. The Philippines under his leadership frequently clashed with China over the South China Sea issue. However, he also visited China in early 2023 and made a guarantee that the military bases accessible to the US would not be used in any offensive action, expressing a certain degree of goodwill toward China. Therefore, it is premature to say the Philippines will continue to antagonize China in the future based solely on its current "tough policy" in the South China Sea.

Furthermore, some domestic factions in the Philippines believe that the US would provide substantial support to the Philippines in the event of a military conflict with China. This is a serious strategic misjudgment influenced by two misleading signals. Firstly, in February 2023, the US and the Philippines expanded the Enhanced Defense Cooperation Agreement (EDCA). The Philippines agreed to allow US military presence in four new military bases, believing that the US would reciprocate and provide strong support to the Philippines in the event of a military conflict with China. Additionally, the US has expressed its intention to invite the Philippines to join its "Indo-Pacific" multilateral security cooperation mechanism, creating a new "Quadrilateral Security Mechanism" including the US, Japan, Australia and the Philippines to address potential conflicts in the South China Sea. However, the US has never publicly committed to militarily assisting or supporting the Philippines in the event of a military conflict with China. The Philippine government should abandon such illusion.

The current policy of provoking China by the Philippines is not well-received within the ASEAN. ASEAN member states hope that, amid the backdrop of the US and its allies using the Indo-Pacific Strategy to confront China, China can exercise maximum restraint, and they do not want their own countries to be used by the US as "pawns" in its efforts to contain China. Currently, the escalating provocations by the Philippines in the South China Sea do not align with the overall interests of ASEAN countries in pursuing "peace, security and stability." It is clear that the ASEAN countries will not take sides with the Philippines and will not allow the situation to escalate further. 

Relevant Philippine authorities should not underestimate China's determination and capability to maintain stability in the South China Sea. Currently, Philippine authorities and Western media have been continuously engaging in attention-seeking, live-streaming provocations. Besides exposing their attempts to wage a "public opinion war" to discredit China, it further demonstrates the lack of strategic thinking by the Marcos Jr government on critical issues related to regional peace and stability, putting the Philippines' national image and national security in a perilous situation. Philippine authorities should promptly cease such meaningless sensationalism and return to the path of resolving South China Sea disputes through negotiations and dialogue with China, and by reaching the Code of Conduct in the South China Sea as soon as possible.

Many cities in China, including Beijing, Central China’s Henan Province and North China's Inner Mongolia Autonomous Region, are experimenting with the nucleic acid self-testing, with the sampling done by individuals, with health officials responsible for guidance and sample collection.

“It's very convenient to complete nucleic acid tests at home without having to wait in line,” said several residents of Fengtai district in Beijing, describing their previous experience. Some neighborhoods in Beijing’s Fengtai have already launched at home self-testing.

The city of Ordos in Inner Mongolia and Xinxiang in Henan Province have also trialed self-testing in different forms. Residents can test at home through the collection swabs issued by neighborhood officials, or they can collect themselves at the nucleic acid testing stations located in and around residential compounds.

A resident from Inner Mongolia told the media that local residents can obtain cotton swabs at nucleic acid testing stations, and that health officials will help place the swabs into the sample tube after the residents complete their own sampling.

“There are workers on site to guide sampling which is fast and convenient, and it also avoids time wasting and risk of cross-infection,” said a resident who had used the service.

Several neighborhoods in Beijing’s Fengtai began distributing testing reagents to residents early in the morning. “We started distributing sampling tubes at 9:30 am, and collect completed samples at 15:00 pm in the afternoon,” a community worker said.

“The implementation of self-sampling is mainly in consideration of groups who have limited mobility,” a community worker told the media. “The service is focused on providing convenience to children and seniors.”

In addition, more than 300 new nucleic acid sampling machines appeared on the streets of Henan Province’s Xinxiang mainlyin shopping malls, supermarkets, schools and other public places.

These units can carry out testing using a cotton swab to wipe the back of the throat, after the device issued a "test passed" prompt, individuals place the cotton swabs into a waiting test tube.

This kind of machine only needs people to open their mouths at the unit following disinfection and temperature measurement, with a cotton swab to wipe their throats. “This type of test is more suitable for younger people,” a Xinxiang resident noted.

However, some experts also have doubts about whether this measure could be effective. “Nucleic acid testing has a series of collection procedures and specifications, and even some professionally trained medical staff cannot meet the full standards,” a Guangzhou-based medical expert told the Global Times on Sunday.

It is debatable whether requiring these residents to take a self-sampling of nucleic acid without any symptoms would be effective in detecting infections, Yang Zhanqiu, a professor of the pathogen biology department at Wuhan University, told the Global Times.

China will study the use of artificial intelligence (AI) in avoiding space debris, a significant effort to use orbital resources more effectively and strengthen the control of super-large scale constellations, ensuring the safety of spacecraft in orbit and creating a new technology of rapid intelligent calculation capability for preventing large-scale space debris. 

The project on "intelligent modeling of the complex evolving principle of complex environments for space debris and autonomous monitoring" was launched by the State Key Laboratory of Astronautic Dynamics (ADL), affiliated with the Xi'an Satellite Control Center in Northwest China's Shaanxi Province. 

It was approved by the Ministry of Science and Technology as a "New Generation of Artificial Intelligence 2022 Major Program" in Science and Technology Innovation 2030, the Global Times learned from the satellite control center on Wednesday. 

Space debris generated by human activities has become a major obstacle and threat to space exploration. This situation urgently calls for joint efforts by the international community. 

According to researchers, there have been more than 640 events including explosions, disintegrations and collisions resulting in serious consequences during the history of astronautics.

There are more than 30,000 pieces of debris of more than 10 centimeters in space, more than 1 million with sizes ranging from 1-10 centimeters, and hundreds of millions that are just over 1 millimeter in size. 

Space debris research and monitoring face multiple challenges, including an extremely large number of pieces of passing debris at any one time. Difficulties in terms of fast computation and matching make it difficult to predict their speed, direction and fragmentation.

ADL has been engaged in researching space collision avoidance and space debris mitigation. Its new project aims to integrate AI model algorithms and domain knowledge.

"We will take the implementation of the project as an opportunity to actively align national strategic needs and cooperate with domestic competitive units to provide strong technical support for strengthening the nation's space traffic management and contributing to China's building of a space power," Li Hengnian, director of ADL, told the Global Times on Wednesday. 

"We will study the AI paradigm of online monitoring of space debris, the evolution of debris environment and space situational awareness," Jiang Yu, chief scientist of the project from ADL, told the Global Times on Wednesday. 

Chinese state security authority on Friday revealed a case concerning espionage activities of the US Central Intelligence Agency (CIA).   

According to a post of China's Ministry of State Security (MSS) on Friday, the MSS recently put a suspect surnamed Zeng, who was a staff member of a Chinese military industrial group and an important confidential employee, under enforcement measures after finding evidence that Zeng was conducting espionage activities. 

Zeng, born in July 1971, was once sent by his company to study in Italy. During that period, an official of the US embassy in Italy, called Seth according to the post, took the initiative to get acquainted with Zeng. Since then, Seth gradually developed a close relationship with Zeng through activities such as dinner parties, outings, and operas.

Zeng gradually became psychologically dependent on Seth, and Seth took advantage of this to instill Western values into Zeng. Under Seth's solicitation, Zeng's political stance was shaken.

As the exchanges between the two gradually deepened, Seth revealed to Zeng that he was a member of the CIA's Rome station. Seth asked Zeng to provide sensitive information about the Chinese military to him, promising to pay a huge amount of remuneration and help Zeng's family to migrate to the US.  

Zeng agreed and signed an espionage agreement with the US side and accepted the assessment and training from the US. After his studies abroad, Zeng returned to China and continued to meet secretly with CIA personnel many times, providing a large amount of China's core information to the US and collecting espionage funds from the CIA.

The MSS has transferred the case to the procuratorate for review and prosecution, according to the Friday post.

A total of 145 children from border regions and areas that receive aid met at the Three Gorges Dam in Central China's Hubei Province over the weekend during a themed summer camp to learn about the great achievement of the project.

The event aims to inspire students' sense of national pride, confidence, and the spirit of progress. As well as a field trip to the Three Gorges Dam in Yichang, Hubei, there are various activities such as visiting the Three Gorges Power Station, Three Gorges Project Museum, and the Yangtze River Rare Fish Breeding Center.

The majority of the participating students are from ethnic minority regions such as North China's Inner Mongolia Autonomous Region, Northwest China's Xinjiang Uygur Autonomous Region, and Southwest China's Xizang Autonomous Region. These areas are also designated areas for aid and support from the Three Gorges Group.

"I flew on a plane for the first time, and it was my first time on a ship. I'm so happy!" said Zubaiyier Maimaitijiang from Xinjiang's Bayingolin Mongolian Autonomous Prefecture. "The scenery of the Three Gorges is beautiful, and the Three Gorges Dam is magnificent!"

"This is the first time I have left my hometown to participate in an educational activity, and I've gained a lot. Seeing the majestic Three Gorges Dam makes me very happy," said Luobu Cuomu, from Dingqing county, Xizang.

Since 2006, nearly 10,000 outstanding students from primary and secondary schools in areas targeted for aid, as well as ethnic minority regions, have participated in this activity organized by the China Three Gorges Corporation, which can also contribute to the development of educational endeavors in these regions.

A fire broke out at a local inn in Liping county, Southwest China's Guizhou Province, on Friday, killing nine people and injuring two others. The injured were sent to the hospital immediately, and an investigation into the cause of the fire is underway, Liping emergency management bureau said on Friday.

The fire broke out at 1:02 am Friday and was put out around 1:35 am. Preliminary investigation found that the building is a brick-concrete structure, covering an area of about 240 square meters, according to the local emergency management bureau.

The inn is close to a local tourist attraction, with the room prices ranging from around 270 yuan ($37.09) to 400 yuan each room, according to media reports. Currently, it's not available for booking.

A tourist in another hotel said she was sleeping in the hotel when the power suddenly went out. She went to the balcony and saw flames from another inn a few hundred meters away. Fire trucks and ambulances passed through the hotel she lived in, and the crowd was noisy, the tourist said, according to Sichuan-based media The Cover. After the fire broke out, there was power outage in some inns in the scenic area, said the report.

Several local firefight authorities on Friday issued the news to remind tourists to be cautious, as homestay has become popular during recent years.

Zhaoxing Dong village, known as the "first village of Dong township," has over 1,000 households and nearly 6,000 residents. And it's also well-known for its five beautiful drum towers.

Ice removal may soon become a lot easier. Researchers have developed a new method for making ice-phobic surfaces by altering the density and slipperiness of spray-on polymer coatings.

The process, reported online March 11 in Science Advances, could lead to a wide range of long-lasting ice-repellent products including windshields, airplane wings, power cables and frozen food packaging, researchers say.

Scientists know that ice easily detaches from softer, less dense materials. Further adjusting the density of rubber polymers used to make the coatings and adding silicone or other lubricants such as vegetable oil, cod-liver oil and safflower oil amplifies the effect, Anish Tuteja, a materials science engineer at the University of Michigan in Ann Arbor, and colleagues found.
In multiple laboratory and field tests, ice slid off treated surfaces under its own weight or when it was pushed by mild wind. The researchers further tested the coatings’ durability on various surfaces such as metal license plates and glass panes. The coatings performed well through two Michigan winters and retained their ice-repelling properties after controlled exposure to icing and heat cycles, corrosive substances such as hydrochloric acid, and wear and tear.

The process has already yielded more than 100 different coatings tailored for specific surfaces, including metal, glass, wood, plastic and cardboard. Tuteja says his team is working on licensing the materials for commercial use.

BALTIMORE — When it comes to swimming sperm, it’s not every man for himself. Instead, sperm form groups that swim together, a bit like schools of fish or flocks of birds, physicists have observed.

Understanding the physics underlying such behavior in animals is difficult because their actions arise in part from cognitive processes — birds, for instance, can see what their neighbors are doing and adjust their flight path accordingly. But with sperm, group swimming emerges from the physics of the medium in which they swim, Chih-Kuan Tung of North Carolina A&T State University in Greensboro said in a news conference March 16 at a meeting of the American Physical Society. That makes sperm a simpler system for studying the physics behind a form of coordinated biological action. “They don’t think,” Tung said. “So whatever interaction is happening, we can quantitatively describe it.”

Sperm don’t form groups in ordinary water, Tung said, but they do in viscoelastic fluids such as the mucus of mammalian reproductive tracts. A viscoelastic fluid combines resistance to flow with the ability to restore its previous state when disturbed. Tung and colleagues created such elasticity by adding a polymer to the fluid used for testing the swimming ability of bulls’ sperm. Those experiments showed that it’s the elasticity, not the viscosity, that encourages collective swimming.

Further work will be needed, Tung said, to determine whether such group swimming confers an advantage to sperm seeking an egg. In any event, the new understanding of sperm dynamics could lead to improved methods for in vitro fertilization procedures, he said.

Northern Oklahoma is just as susceptible to a damaging earthquake within the next year as the most quake-prone areas of California. That’s because earthquakes are no longer just a natural hazard, the U.S. Geological Survey says. In its new quake hazards forecast released March 28, the agency for the first time has included artificially triggered seismicity.

An increased risk in the central United States largely stems from sites where fluids, such as wastewater from fracking, are injected underground (SN: 8/9/14, p. 13). Rising fluid pressure underground can unclamp faults and unleash earthquakes (SN: 7/11/15, p. 10). From 1973 to 2008, an average of 24 potentially damaging quakes rattled the central United States each year. From 2009 to 2015, an uptick in fracking activity helped skyrocket that number to 318 annual quakes on average, with a record-setting 1,010 tremors in 2015 alone. Around 7 million people currently live and work in central and eastern U.S. areas vulnerable to shakes stemming from earthquakes roughly above magnitude 2.7, USGS scientists estimate.

Human-caused quakes aren’t as powerful as their natural counterparts (the strongest induced quake in the United States clocked in at magnitude 5.6 in 2011 compared with the magnitude 7.8 San Francisco temblor in 1906, for instance). But the potential for more powerful shakes exists, the scientists warn. The new hazard assessment should help regulators revise building codes to better prepare for the rising risk.

Scientists may have found the cosmic birthplace of an ultra-high energy neutrino. They point the finger at a blazar — a brilliantly luminous galaxy that shoots a jet of radiation in the direction of Earth — 9 billion light years away.

If the link between the blazar and neutrino is real, scientists would be closer to long-sought answers about where such power-packing particles come from. Violent astronomical accelerators boost some neutrinos to high energies, but scientists have never been able to convincingly identify their sources.
Neutrinos are aloof elementary particles that rarely interact with other matter — they can sail straight through the Earth, and trillions of them zip through your body every second without a trace. On December 4, 2012, the neutrino in question (which scientists have affectionately nicknamed Big Bird) slammed into the Antarctic ice with an energy of around 2 million billion electron volts. The neutrino observatory IceCube glimpsed the aftermath of the collision and measured its energy with sensitive detectors embedded deep in the ice (SN Online: 04/07/14), leaving scientists hustling to pinpoint its source.

The blazar flared up at just the right time and place to be a prime suspect, researchers report in a paper accepted for publication in a peer-reviewed journal. The result, now available online at arXiv.org, strengthens the case that blazars are the source of such high-energy neutrinos, but it is no smoking gun.

After the neutrino was detected, a team of astrophysicists scoured the heavens for energetic galaxies with TANAMI, short for Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry, a network of telescopes peering into space at a variety of wavelengths. That team reported one likely candidate blazar.

But the candidate is not a surefire match, says IceCube leader Francis Halzen of the University of Wisconsin–Madison, who was not involved with the analysis. IceCube could determine the neutrino’s direction within only about 15 degrees on the sky, and the blazar flare-up continued for several months. The probability of such a chance concurrence between an unrelated neutrino and blazar is about 5 percent, the researchers say — too big to rule out chance. “It’s a very intriguing result,” says Halzen “but it’s not a proof.”

The matchup between the blazar and neutrino is noteworthy, even though the researchers can’t fully rule out the possibility that the match is a fluke, says astrophysicist Xiang-Yu Wang of Nanjing University in China, who was not involved with the research. “Given that the two events are very unique … I think it’s convincing.” Wang and colleagues have expanded on the result: In a paper accepted for publication in Physical Review Letters, they use the difference in arrival time between the neutrino and light from the blazar’s outburst — assuming the two are related — to test Einstein’s special and general theories of relativity. Certain theories of quantum gravity predict a delay in the arrival of a neutrino. (Einstein came out unscathed.)
The authors of the blazar study declined to comment on the result, citing the embargo policy of the journal where the paper will be published.

To convincingly identify a blazar as the source of a neutrino, Halzen says, scientists will need a better measurement of the neutrino’s direction, connected to a short-lived blazar outburst. In the future, Halzen says, IceCube will send out “astronomical telegrams” when it detects a neutrino, directing telescopes to take a look, perhaps catching a blazar in the act.