Second, the difference between a visa and a passport is mainly reflected in the difference in their relationship. Passport is a book, and visa is attached to it. Passport is equivalent to ID card, and visa is equivalent to passport.
Passport is a legal document issued by a country to prove the nationality and identity of its citizens when they enter and leave the country and travel or stay abroad. The word Passport means port pass in English.
In other words, a passport is a passport for citizens to pass through international ports in various countries. Therefore, some countries in the world usually issue passes instead of passports.
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 department (such as immigration bureau or its embassy or consulate abroad) to express approval to foreign citizens.
According to the principles of international law, any sovereign country has the right to decide whether to allow foreigners to enter or leave the country, and to issue visas, refuse to issue visas or announce the cancellation of visas already issued according to its own laws.
The visa is usually attached to the passport or other international travel documents held by the applicant. Under special circumstances, valid passports or other international travel documents can be written on a separate sheet. With the progress of science and technology, some countries began to issue electronic visas and biological visas, which greatly enhanced the anti-counterfeiting function of visas.
Different countries issue different types of passports.
Diplomatic passports are mainly issued to China government officials above deputy ministers and vice governors, heads and deputy heads of important delegations such as the party, government and army, as well as diplomatic officials, consular officials and their accompanying spouses, minor children and diplomatic envoys.
Official passports are mainly issued to the staff of government departments at all levels in China, the staff of Chinese diplomatic missions abroad, consular offices, United Nations organizations and relevant specialized agencies, their accompanying spouses and minor children.