7: 11 to 11: 31 and 16: 11 to 18: 31. The time for nucleic acid detection in Changsheng Square, the eighth street of Zhengzhou Economic Development Zone is from 7: 11 to 11: 31, and from 16: 11 to 18: 31. According to the Notice on Optimizing and Adjusting Social Prevention and Control Measures for COVID-19 Epidemic (No.163, 2122) issued by the Office of COVID-19 Epidemic Prevention and Control Headquarters, the negative certificate of nucleic acid test will no longer be checked when entering and leaving the community, public places and public transportation; Those who enter key places such as medical institutions, pension welfare institutions, prisons and closed places such as KTV, Internet cafes and beauty salons, and leave Zhengzhou through Zhengzhou Railway Station, high-speed railway station, bus station and airport, need to check the negative certificate of nucleic acid testing. The business hours of the nucleic acid testing cabin in the Economic Development Zone are from 7: 11 to 11: 31; 16: 11 to 8: 31.