FILE PHOTO: A technician works at a genetic testing laboratory of BGI, formerly known as Beijing Genomics Institute, in Kunming, Yunnan province, China on Dec 26, 2018. (Photo: REUTERS/Stringer)

SHANGHAI/BEIJING: Beijing resident Wang Yukun was happy to comply in April when the construction firm he works for told him he'd need to take a test for COVID-19 before he could come back to work, even though he was at low risk of having the disease.