Where does Lanzhou want to do nucleic acid testing now?

Lanzhou now enters nursing homes, welfare homes, child care institutions, primary and secondary schools and other important places, and must check the negative certificate of nucleic acid test and health code within 7 days. According to the relevant public information, all counties and districts should take the initiative to connect with important organs, large enterprises and some specific places within their jurisdiction, determine the frequency of negative nucleic acid test certificates and health codes, and do a good job in service guarantee.