A single entry tourist/family visit visa is enough for your trip to China. You are required to provide following documents:
1. Original passport valid for at least six months with sufficient blank visa pages.
2. One completed Visa Application Form a passport photo stuck on it;
3. You should provide the original and a copy of residence permit which should be valid for at least half a year.
4. You may be required an invitaion letter from your friend in China.
5. The round trip ticket and hotel reservation and your bank certificate which ensure your trip to China.