What do you mean by imprisoning immigrants?

Hehe, the so-called immigration supervisor means that you usually have to wait 3-8 years or even longer while waiting for the green card to be approved. During this period, due to foreign laws and regulations, such as not being unemployed, not paying taxes on time, not leaving your job for more than one year and so on. And it is difficult to meet these conditions. So it's like going to jail.