When a foreigner invites you to visit him/her in China, the embassy visa office needs a copy of the inviter’s visa.
Often, the customers send us the wrong document. We have samples for both posted here. Please note the red cycled area, one says “RESIDENCE PERMIT” and the other says “VISA”. Please make sure to ask your inviter to get a copy of the visa page, NOT the residence permit, EVEN the visa is already expired and the inviter has been using the residence permit to enter China lately.