How many years does it take for human beings to immigrate to another planet?

Which planet did you immigrate to? It's not a one-time move, the time will be shorter ... If Mars is involved, a sudden leap in technology may occur within 30 years (there are plans to immigrate to Mars, which are gone forever, and many people sign up, but the key is powerful rockets and the like, which should be under development), but the possibility is relatively small; Generally speaking, about 50 years ... in fact, immigration is very troublesome, there are many problems to be solved, and the time problem is hard to avoid. Forecasting is useless, it depends on the progress of the actual situation ...