What do you think is the difference between immigration, exit-entry administration and immigration company?

What do you think is the difference between immigration, exit-entry administration and immigration company?

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Immigration is the administrative department of the government.

The Exit-Entry Administration is a government functional department.

Immigration companies are private enterprises.

Can this have anything to do with ...

The Immigration Bureau is responsible for managing the examination and handling of immigration identity and materials.

The Exit-Entry Administration is responsible for entry and exit affairs.

Immigration companies have no right to collect money to help you with any chores.

For example:

The US Immigration Bureau has the right to grant you an immigrant visa or refuse to grant you an immigrant visa.

Suppose you get an American immigrant visa and go to the entry-exit inspection port in China (near the border, such as the international airport/wharf), the China Exit-Entry Administration has the right to decide whether to allow or refuse you to leave the country. Suppose the China Exit-Entry Administration refuses you to leave the country, you can go home directly; Assuming that the China Exit-Entry Administration allows you to leave the country and you arrive at the US entry-exit checkpoint, the US Exit-Entry Administration has the right to decide whether to allow or refuse your entry. If the US Exit-Entry Administration allows you to enter the United States, then you can enter the United States; If the US Exit-Entry Administration decides to refuse you entry (although you have an immigration visa from the US Immigration Service), it will tell you when you will be repatriated (or whether you are allowed to appeal)-usually immediately, you pay for your return ticket. Suppose you are refused entry by the US Exit-Entry Administration and sent back immediately. You get off the plane and go back to the China Exit-Entry Administration. The China Exit-Entry Administration can decide whether to allow or refuse your entry. If the China Exit-Entry Administration decides to allow you to enter the country, congratulations, you can go home again; If the China Exit-Entry Administration decides to refuse you entry, congratulations. You may have been deprived of your nationality by the China government and become stateless. According to the film, you may be able to wait indefinitely in the airport (you have never been to China), live at your own expense, and wait for a country (including China) to accept you as a refugee. During the whole process, the immigration company didn't fart and couldn't do anything.