Chinese leader Xi Jinping has built a sprawling security system to prevent violent forces from destabilizing society. A new wave of deadly attacks is putting pressure on officials to expand that surveillance state. China was stunned this month by its deadliest act of public violence since a string of terrorism strikes rocked the remote Xinjiang region in 2014. Dozens were hospitalized and 35 killed by the bloody car-ramming in Zhuhai city that was the culmination of a spate of violence this year -- mostly stabbings -- which have sparked nationwide anxiety. Xi responded to spouts of ethnic violence a decade ago by installing a network of facial recognition cameras, tightening Internet controls and expanding a national resident database.

Natural language processing models based on neural networks are vulnerable to adversarial examples. These adversarial examples are imperceptible to human readers but can mislead models to make the wrong predictions. In a black-box setting, attacker can fool the model without knowing model's parameters and architecture. Previous works on word-level attacks widely use single semantic space and greedy search as a search strategy. However, these methods fail to balance the attack success rate, quality of adversarial examples and time consumption. In this paper, we propose BeamAttack, a textual attack algorithm that makes use of mixed semantic spaces and improved beam search to craft high-quality adversarial examples. Extensive experiments demonstrate that BeamAttack can improve attack success rate while saving numerous queries and time, e.g., improving at most 7\% attack success rate than greedy search when attacking the examples from MR dataset. Compared with heuristic search, BeamAttack can save at most 85\% model queries and achieve a competitive attack success rate. The adversarial examples crafted by BeamAttack are highly transferable and can effectively improve model's robustness during adversarial training. Code is available at https://github.com/zhuhai-ustc/beamattack/tree/master

Chinese academics have christened an ocean research vessel that has a twist: it will sail the seas with a complement of aerial and ocean-going drones and no human crew. The Zhu Hai Yun, or Zhuhai Cloud, launched in Guangzhou after a year of construction. The 290-foot-long mothership can hit a top speed of 18 knots (about 20 miles per hour) and will carry 50 flying, surface, and submersible drones that launch and self-recover autonomously. According to this blurb from the shipbuilder behind its construction, the Cloud will also be equipped with a variety of additional observational instruments "which can be deployed in batches in the target sea area, and carry out task-oriented adaptive networking to achieve three-dimensional view of specific targets." Most of the ship is an open deck where flying drones can land and be stored.

China on Tuesday showed off its increasingly sophisticated air power including surveillance drones, with an eye on disputed territories from Taiwan to the South China Sea and its rivalry with the United States. The country's biggest airshow, in the southern coastal city of Zhuhai, comes as Beijing pushes to meet a 2035 deadline to retool its military for modern warfare. China still lags the United States in terms of tech and investment in its war machine, but experts say it is narrowing the gap. On Tuesday, the air force aerobatic team left colourful vapour trails as it manoeuvred in formation, while visitors inspected new jets, drones and attack helicopters on the tarmac. The CH-6, a prototype drone with a wingspan of 20.5 metres (67 feet), was among the domestic tech unveiled.

China on Tuesday showed off its increasingly sophisticated air power including surveillance drones and jets able to jam hostile electronic equipment, with an eye on disputed territories from Taiwan to the South China Sea and rivalry with the United States. The country's biggest airshow, in the southern coastal city of Zhuhai, comes as Beijing pushes to meet a 2035 deadline to retool its military for modern warfare. China still lags the United States in terms of tech and investment in its war machine, but experts say it is narrowing the gap. On Tuesday, a prototype of a new surveillance drone able to carry out attacks -- the CH-6 -- was among domestic tech unveiled in Zhuhai. China's WZ-7 high-altitude drone for border reconnaissance and maritime patrol has already entered service with the air force, according to state media Photo: AFP / Noel Celis With a wingspan of 20.5 metres (67 feet) and 15.8 metres long, the drone can carry missiles and is designed for surveillance and strike operations, according to open source intelligence agency Janes. Other debutants include the WZ-7 high-altitude drone for border reconnaissance and maritime patrol, as well as the J-16D fighter jet which can jam electronic equipment.

China is rolling out stealth drones and pilot-less aircraft fitted with deadly weapons, such as AK-47 rifles, onto world markets. Combat drones were among the jet fighters, missiles and other military hardware shown off this week at Airshow China, the country's biggest aerospace industry exhibition. China's automated warplanes are already flying in the Middle East, and the newly unveiled unmanned jets signal Beijing's determination in catching up and eventually rivaling with the United States in the global military drone market. Visitors to the Airshow China take pictures of CH-7, China's newest stealth combat drone Saudi Arabia and Pakistan are in discussions to acquire the Chinese-made Blowfish A2 (pictured). A director from Ziyan, the manufacturer of the helicopter drone, said they could add'whatever' weapons required by clients to the unmanned aircraft One of the most eye-catching drones displayed at the exhibition in Zhuhai was CH-7, or Rainbow-7, China's newest stealth combat drone.

ZHUHAI, CHINA – China is unleashing stealth drones and pilotless aircraft fitted with AK-47 rifles onto world markets, racing to catch up to U.S. technology and adding to a fleet that has already seen combat action in the Middle East. Combat drones were among the jet fighters, missiles and other military hardware shown off this past week at Airshow China, the country's biggest aerospace industry exhibition. A delta-winged stealth drone received much attention, highlighting China's growing production of sophisticated unmanned aerial vehicles seeking to compete with the U.S. military's massive fleet. The CH-7 -- a charcoal-gray UAV unveiled at the air show -- is as long as a tennis court and has a 22-meter (72-feet) wingspan. It can fly at more than 800 kph (500 mph) and at an altitude of 13,000 meters (42,650 feet).

ZHUHAI, CHINA – A Chinese state-owned company says it is developing a stealth combat drone in the latest sign of the country's growing aerospace prowess. The CH-7 unmanned aerial vehicle also underscores China's growing competitiveness in the expanding global market for drones. China has won sales in the Middle East and elsewhere by offering drones at lower prices and without the political conditions attached by the U.S. The CH-7's chief designer, Shi Wen, says the aircraft can "fly long hours, scout and strike the target when necessary." "Very soon, I believe, in the next one to two years, (we) can see the CH-7 flying in the blue skies, gradually being a practical and usable product in the future," Shi told The Associated Press. Shi said manufacturer Chinese Aerospace Science and Technology Corporation plans to test fly the drone next year and begin mass production by 2022.

Hong Kong-based shipping company Orient Overseas Container Line (OOCL) has teamed up with Microsoft's research arm in Asia to advance the application of Artificial Intelligence research in the shipping industry. The collaboration will look for ways to use AI to improve shipping network operations and achieve efficiencies within OOCL's business. The project is expected to nurture over 200 AI developers over the next 12 months. OOCL sees AI as key to the it's digital transformation. The company already uses machine learning in some its operations and has as a talent base of over 1,000 developers located in San Jose, Hong Kong, Zhuhai, Shanghai and Manila.

The 119 drones underwent catapult-assisted take-offs and performed aerial formations, the Xinhua News Agency reported on Sunday. The CETC said "swarm intelligence" is regarded as the core of the artificial intelligence of unmanned systems and the future of intelligent unmanned systems. The huge scale of low cost and multi-function UAVs could be used in risky tasks such as emergency communications. CETC engineer Zhao Yanjie said since drones were invented in 1917, intelligent swarms have "changed the rules of the game." In November 2016, the CETC launched 67 drones during the China International Aviation & Aerospace Exhibition in Zhuhai, South China's Guangdong Province, breaking the previous record of 50 drones by the US Navy, CCTV reported.