August 18 in Ningling County cannot be unsealed. According to the query data, at 0: 00 on August 18, the whole area of Ningling County turned to normal prevention and control. People don't have to leave Ning, but those who really need to leave Ning must hold a negative certificate of nucleic acid test within 48 hours, and the work unit or village society will stamp the official seal and the health code will be green.