What does immigration control mean?

"Immigration supervisor" is a vivid metaphor. For example, if you want to immigrate, you have to go to prison. You can't leave the country you want to emigrate for a long time (short term), because if you leave for a long time, you can't apply for naturalization or lose your immigration status.

Take Britain as an example:

After immigrating to the UK for five years, applicants can apply to become British citizens as long as they meet certain residence requirements, that is, they must not stay outside the UK for more than 450 days during the second to fifth years. After becoming a British citizen, the departure time is no longer restricted. At the same time, Britain allows dual citizenship.

Therefore, it is suggested that immigrant applicants can also take the basic English exam for naturalization at any time within five years, and pass the exam to become British citizens after living for six years.

Impact of immigration:

1, positive impact:

Immigration has expanded the living space of human beings, promoted the expansion of production geographical space, the spread of human civilization, the development of social economy and culture, people's self-pursuit and self-improvement, the growth of regional economy, the improvement of people's quality of life and the improvement of the relationship between man and nature.

2. Negative effects:

Improper migration will lead to social group conflicts, social exclusion and division, secondary poverty, social instability, increased national and local economic burden and deterioration of living environment.

Refer to the above content: Baidu Encyclopedia-Immigration Supervision