According to Zhaoqing Health Bureau, from 0:00 to 24:00 on May 22, Zhaoqing reported a case of asymptomatic infection after returning to Zhaoyang from outside the province. A case of asymptomatic infection after returning to Zhaoyang outside the province was as follows: male, 23 years old, Chinese, tested positive for novel coronavirus nucleic acid outside the province on May 5, and was isolated for treatment. After the release of isolation treatment, he returned to the hospital from outside the province on May 20, that is, he was transferred to the centralized isolation point according to the whole process closed-loop management procedure. During the isolation period, novel coronavirus nucleic acid was detected positive. Zhaoqing Health Bureau reminded the general public to continue to fulfill their personal prevention and control responsibilities and take protective measures such as wearing masks, washing hands frequently, more ventilation, frequent disinfection and maintaining social distance. (Xinhua News Agency)