How to check the official seal of the entry-exit unit when agreeing to bid?

Enquiries are made at the Exit-Entry Administration Center. The stamp of the Exit-Entry Administration Office can be inquired at the Exit-Entry Administration Center, and the authenticity of the passport can also be inquired at the Exit-Entry Administration Center. The State Administration of Immigration (People's Republic of China (PRC) Exit-Entry Administration) was established on April 2, 2008. It is the national bureau and deputy ministerial level under the management of the Ministry of Public Security, responsible for leading and managing the national entry-exit frontier inspection agencies and border management agencies.