Photo taken on Sept. 26, 2021 shows a PCR (polymerase chain reaction) lab for nucleic acid testing in Bayan County, Harbin of northeast China's Heilongjiang Province. A total of three temporary labs for nucleic acid testing have been built in the county. (Xinhua/Wang Jianwei)
3 temporary labs for nucleic acid testing built in Bayan County, Heilongjiang
Source: Xinhua| 2021-09-27 07:25:41|Editor: huaxia