Is the immigration port a state-owned enterprise? How is their immigration business?

Hello, I'm glad to answer your question. By entry and exit port, you should mean the entry and exit port of Shanghai Entry-Exit Service Center. Established in 1988, they are the earliest immigration business organization in China, which belongs to the Shanghai Municipal Committee of the Communist Youth League and belongs to the nature of state-owned enterprises. As for the business, I can't give you an exact answer for the time being, but according to the enterprise background, the business ability should be good.