You can immigrate after joining the league.

It depends on whether this fight and imprisonment is a criminal offence. If it is a violation of public security regulations, it will have little impact. Go to the public security bureau to get a "certificate of no criminal record".

If it's just a simple visa, the visa center will check it loosely and generally won't check your criminal record again. Please explain that if the visa officer sees something unusual to investigate, once he finds it, he can't go to that country for a long time!

2. If it is a criminal offence, the key depends on whether there is a "certificate of no criminal record", and the others are the same as the "violation of public security regulations" mentioned above.

3. If you are going to apply for an immigration or immigration-related visa, it will be very strict and all criminal records will be found out. Unless very few countries do not require a "criminal record", there are very few such countries.

4. One thing, for example, in the future, children who want to join the party, take an examination of civil servants, and work in government customs and other departments will be hindered. But joining the league will basically not be checked. As long as this is not reflected in the application form, there will be no problem.