No need. Cangzhou City is a prefecture-level city in Hebei Province, located in the Heilonggang River Basin in the southeast of Hebei Province and in the east of Hebei Plain. You don't need nucleic acid testing to drive to Cangzhou. Nucleic acid detection is the detection of pathogen nucleic acids in various body fluid samples or tissue samples by molecular biological techniques (such as real-time fluorescence polymerase chain reaction, isothermal amplification, in situ hybridization, sequencing, etc.). ) to determine whether pathogen infection occurs.