Zhang Xin holds inactivated samples for nucleic acid tests at a lab of China-Japan Friendship Hospital in Beijing, capital of China, July 3, 2020. Yan Keqin and Zhang Xin, medical workers from different departments of China-Japan Friendship Hospital, now work on a temporary laboratory team to help carry out COVID-19 nucleic acid tests at the hospital. Their daily tasks include sample collection, sample disposal, virus inactivation and information input. (Xinhua/Zhang Yuwei)
