Why was Beihai unsealed?

As August 16th is just around the corner, the fishermen in Qiaogang Town, a big fishing town, began to strongly demand to lift the seal, go to sea to work and support their families on August 14th. Then on August 15th, several communities strongly appealed for unsealing and working to survive. Some people began to call up to reflect, epidemic prevention hotlines at all levels were blown up, and some people found the CCTV news hotline to call hard, reflecting the problems of epidemic prevention work in the city. At 9: pm on August 15th, there were rumors that the city was unsealed at : am on August 16th, and the people in the city rejoiced, just like waiting for the countdown on New Year's Eve. At 11: pm on August 15th, the municipal epidemic prevention headquarters issued an official notice announcing that the city was unsealed at : am on August 16th, realizing the normalization of the city.