hi my boyfriend nepalee want to come here in hk as tourist what are the documents needed and how muc

Dolores, he needs to provide copy of passport, a completed application form, a passport-style photo, his financial support proof, flight itinerary, accommodation arrangement, and an invitation letter from you.
There is no specific requirement for how much he should have for show money. He needs to make sure that he has enough money to cover all his expenses in HK.