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Chen spent the first years at the academy researching radar and target detection technology and played a major role in China's first attempt to build a missile defense system, which was later abandoned due to technical difficulties.

Chen Qiaoshan, a medical analyst at Beijing-based market research consultancy Analysys, said: "Although many multinational pharmaceutical firms have R&D centers in China, the R&D process of a new drug is quite long, usually over 10 years. The success rate is as low as 10 percent."

Chen said that at the start of the outbreak everywhere was closing－"the butcher's around the corner, nearby Chinese supermarkets, neighborhood Chinese restaurants, centers for seniors and family associations".

Chervon Auto was listed on the Shanghai Stock Exchange in May 2019.

Chi Guiyi spoke with Xin Wen.