Friends who are familiar with the border checkpoint come in.

The Shanghai border inspection station you mentioned really belongs to the management of the Ministry of Public Security, and there should be armed police and public security to conduct border inspection. If you are in Yunnan, Guangxi or Tibet or Xinjiang, there will be danger, but if you are in Shanghai, there will generally be no danger. After all, Shanghai border inspection is nothing more than routine border inspection and quarantine at airports and seaports. The public security department mainly assists the customs and health and quarantine departments at border inspection stations, which can help them deal with problems in time. It's not everything, but it's still good