If I want to open a business there, can anyone help me know more about how I can Acquire a permanent residence and maybe even a citizenship on the long run?
I've heard If I had a good business that affects polish economy in a positive way, I would be able to get residence immediately? or after 5 years?
Which country are you from, better still, in which country do you currently reside legally? Best to learn some Polish before undertaking a lengthy stay:-) Especially these days, even neighboring white Europeans, except for those with unusually deep pockets, aren't exactly welcome as outsiders in Poland.
Not wishing to discourage your, merely to draw your attention to potential problems. Good luck!