Dear Sir

My daughter is studying in China for medicine degree. Parents (me and my wife) would like to have a multiple visa to visit her any time we want or in case of emergency as she is alone there and being Eastern parents we are sort of worry (specially my wife).

Is there any special visa for such parents? What documents we need? Submission of proof of her admission in the university and her living at the university hostel would fulfill requirement of "invitation letter" needed for visa to China, I am holding Canadian passport (being dual citizenship) and my wife is holding Pakistani passport.