1. A visa is an annotation or label affixed by the sovereign authority of a country to the passport or other travel documents held by its own or foreign citizens, with clear instructions to indicate the procedures for allowing them to enter, exit or transit. It can also be said that it is an endorsement certificate issued to them.

2. Visa is an act of national sovereignty, and it is a concrete embodiment of a country's entry control and management of citizens of other countries, so as to achieve the purpose of safeguarding national security and domestic social order.

3. Passport is a valid international travel document given by a country or region to prove that citizens or residents of that country enter and leave their own territory or region, travel or stay abroad. The word passport means port pass in English, that is to say, passport is a pass for citizens to pass through international ports of various countries. On February 28th, 2065438+0515, the Ministry of Public Security issued an announcement that citizens no longer need to submit household registration books for private entry and exit documents, and relevant information will be inquired by public security organs through the intranet.