I am an international student in Germany. I believe I will finish my study at the end of February. After that, I plan to extend my resident permit. However one of my passports will expire, I plan that use another valid passport to extend the resident permit. The question is, can I? Since the last time I extended my resident permit, I use my old passport, I don't know if there is any binding between passport and resident permit.
Edit
I am from Hong Kong, so I have a Hong Kong passport and a British National Oversea (BNO) passport.