What's the difference between an immigrant visa and an ordinary visa?

A visa is an entry-exit certificate issued to you by the corresponding country and affixed to your passport or pass.

For example, if you don't have a passport, you need to go to the public security entry-exit hall to apply for a passport book, which will contain some information about you, such as your name, nationality, passport number and so on. . Then, if you want to go to Britain, you need to apply for a visa to Britain at the British Embassy in China. What needs to be prepared depends on the requirements of the embassy. . Upon completion, the embassy will put a visa page on your passport book, so that you can enter the UK.

Pass to Hong Kong and Macao pass as an example. This requires you to apply for a Hong Kong and Macao Pass. Just like the passport book, it also gives you a blank book. . Then you need to apply for an endorsement to Hong Kong or Macao in the entry-exit hall, and it will also be posted in your Hong Kong and Macao Pass after you finish it. . You can take this to Hong Kong and Macau.

Visa is the annotation and seal of the sovereign organ of a country on the passport or other travel documents held by its own or foreign citizens to show that they are allowed to enter or leave its own territory or pass through it. It can also be said that it is an endorsement certificate issued to them.

Generally speaking, a visa is a document issued by a country's entry-exit administration (such as immigration bureau or its embassy or consulate abroad) to approve the entry of foreign citizens.