During the epidemic period, Nanxin medical laboratory actively prepared materials and equipment for the laboratory, and had been trained and audited by the health commission and the clinical examination center for many times. It became one of the new crown nucleic acid testing sites in Huangpu District of Guangzhou, and passed the provincial and national level EQA activities for many times; Nanxin medical laboratory participated in the new crown screening of "safe return home" and "safe return to work" of the whole people from 2020 to 2021, and the continuous new crown detection of frozen products. As of April 2021, more than 300000 human and frozen products testing services have been carried out, which escorts the national epidemic prevention work.