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Before the Chinese Lunar New Year in late January, 50 fourth-graders from Cascade Elementary wrote to Chinese President Xi Jinping, who later wrote back.

Beijing phased out 110 enterprises－many of them manufacturers－because of pollution between January and September.

Beijing has announced a series of countermeasures against the US, including barring the US military from Hong Kong ports and sanctioning various nongovernmental organizations. Lam said her government will follow Beijing's moves.

Beijing's population shrank in 2017－the first time in 17 years－as the result of nonessential functions being relocated outside the city and better urban management, authorities said on Friday.

Beijing law enforcement officers launched a joint investigation, which found that Zhao Chunguang, his father Zhao Shuben, his cousin Zhao Junhao and a hired worker Xing Libin took part in producing and selling pirated books from 2015 to Sept 2016.