Answered by Ling Zhang | 1/12/2016 12:16:14 AM
You can choose any China post office in Chongqing for your friend to pick the letter. If the post office is near to him/her, that's much better. You can ask him/her the address of one around him/her.
You should write the address of the post office near him/her. You should leave the phone number as well in order for the post office in Chongqing to contact your friend when the letter arrives. The post office usually helps to keep the letter for 5 days, after that day they will charge management fees if your friend doesn't go there to pick.