Does it take 48 hours for Shuitou to return to Nan 'an by expressway?

Need. Shuitou Expressway is the expressway with the largest traffic flow in Nan 'an. It takes 48 hours for nucleic acid to pass through it. There are two two-way guide channels at the checkpoint of the expressway. The staff guide the driver to check the health code, nucleic acid report, travel code and other related information, and guide the driver to leave quickly after verification. It also provides free nucleic acid testing services for the majority of drivers and masters. Drivers mainly organize nucleic acid testing from 4 pm to 5 pm every day and fix it at Shuitou checkpoint.