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Beijing police are investigating the incident. Sun's motive for the attack is not clear.
Beijing's food safety watchdog has begun a two-week sanitation inspection of the city's restaurants, following news reports that two Beijing branches of a popular hotpot chain were unhygienic.
Beijing urged the United States to stop its "wrong behavior" after a US naval vessel was warned away from China's territorial waters off the Xisha Islands in the South China Sea on Tuesday.
Beijing will commit itself to taking the lead in building the fifth-generation internet of vehicles to form a complete technological system of intelligent connected vehicles that meet the requirements of advanced autonomous driving, known as Level 4, said the white paper by the Beijing Commission of Economy and Information Technology, issued on the sidelines of the conference.
Beijing reported 13 new confirmed cases of COVID-19 imported from other countries on Saturday, bringing the total number of imported cases in the capital to 97.
来源：资阳报