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Beijing has already phased out 2.1 million vehicles with large or excessive exhaust emissions, resulting in nitrogen oxides declining from 76,500 metric tons in 2013 to 55,800 tons in 2017, according Li's data.

Because there are not enough local farmhands to plant rice seedlings on the Sanjiang Plain, groups of migrant workers descend on the area for several weeks each year. Most of them come from rural parts of Harbin, Qiqihar and Suihua, in Heilongjiang.

Before joining the Trump administration, Malpass was an economic adviser to Trump during the 2016 presidential campaign. He previously served as chief economist at the investment bank Bear Stearns.

Beevers added the Isle of Man was suitable for small and medium-sized companies.

Beijing-based dockless bike-sharing operator Mobike is considering pulling out of Manchester, while the company's major Chinese rival, ofo, has cancelled its service in Norwich, Sheffield, and Leeds.