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Beijing and Washington have been locked in a tit-for-tat trade conflict since April. In its latest retaliatory move prompted by the US side, China said it is ready to slap tariffs on billion of US products if the Trump administration follows through with extra duties on 0 billion of Chinese goods.

Beijing has repeatedly complained about US restrictions on exports in areas such as high-tech goods and urged Washington to lift them.

Beihang University said that no behavior violating norms or ethics is allowed at Beihang, and a mechanism to supervise teachers will be established.

Beijing's water resources authority plans to use artificial intelligence and satellite remote sensing to build an intelligent water body management system able to automatically report violations, an official said.

Beijing, the host city for the 2008 Olympics, and neighboring city Zhangjia-kou, Hebei province, won the right in 2015 to host the 2022 Winter Olympics. Beijing will be the first city to hold Summer and Winter Games.