What are the conditions for negative nucleic acid results in Guangzhou International Health Station?

The results of human, biological and environmental nucleic acids were all negative. According to the relevant regulations of Guangzhou epidemic situation inquiry, Guangzhou International Health Station needs to meet the negative results of human, animal and environmental nucleic acids before it can be released from isolation. After the isolation is released, it is necessary to carry out nucleic acid testing for 7 consecutive days to ensure that all the results are negative before normal operation.