What's the difference between the functions of immigration and embassy?

Difference: Immigration Bureau manages immigration, and the embassy mainly issues visas.

The detailed explanation is as follows:

Most countries in the world have national immigration offices. But China's reform and opening up didn't. China citizens' passports and foreigners' visas to China are under the unified management of the Exit-Entry Administration of the Ministry of Public Security.

Some provinces and cities in China do have immigration offices. But that's not foreign. That's the domestic immigration service. For example, the canyon project caused millions of immigrants.

The establishment of the Immigration Bureau in China is mainly because some large-scale water conservancy projects in China require a large number of residents to move. Responsible for resettlement work, under the reservoir resettlement development bureau of the Ministry of Water Resources.

The foreign immigration bureau is responsible for the entry and exit of foreigners, immigration, study abroad, visas, etc.

An embassy is a permanent diplomatic representative office of a country in the capital of a country with diplomatic relations. A consulate is a representative office of the government stationed in the other country's city to perform consular duties in a certain area. When two countries break off diplomatic relations, they will definitely cancel their embassies, but not necessarily their consulates.

The embassy represents the interests of the whole country and is fully responsible for bilateral relations. The curator is an ambassador, appointed by the head of state and performing his duties as a representative of the head of state. The primary duty of the embassy is to represent the sending country and promote the political relations between the two countries, followed by economic, cultural, educational and scientific relations. The embassy also has consular functions. Promoting relations between the two countries and non-governmental exchanges is an important duty of the consulate, but its main duty is consular work, such as safeguarding the legitimate rights and interests of its citizens and legal persons, issuing or extending passports for its citizens and issuing visas for foreign citizens.

The duties of the embassy cover all areas of the host country, and the consulate is only responsible for the areas under its jurisdiction. Embassies are usually under the direct leadership of the government and the diplomatic department, while consulates usually accept the dual leadership of the diplomatic department and the embassy of the host country.

Many countries have only embassies and no consulates in most countries. Whether or not to set up a consulate, and what level of consulate to set up, mainly depends on the number of overseas Chinese and the regional importance of consular services, in accordance with the principle of reciprocity. For example, China has an embassy and five consulates general in the United States, which are responsible for consular affairs within their respective jurisdictions. In some small countries, there are only consulates and consular officials in foreign countries. At present, China has 157 embassies in 166 countries with diplomatic relations.