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Around the same time, a train full of cargo heads for Poland from more than 300 km away in Chengdu, capital of the southwestern Sichuan province.

Apple posted record revenue on Tuesday but faces new challenges in production of the iPhone as China shuts down major cities to contain the potentially deadly coronavirus, the company said.

Arcfox's first production model is to hit the market in 2020, and future models are to be sold globally, according to one of its executives.

Areas that used to be too harsh for humans have now become habitable. Herders have built homes at the foot of glaciers at the source of the Yangtze.

Around 170 volunteers out of 43,000 people in the trials contracted COVID-19 but 162 were given a placebo, meaning the vaccine was 95 percent effective, the company said. Of the 10 people who had severe COVID-19, one had received the vaccine.