You can apply for a tourist group visa to China, it requires at least 5 people who must travel together both in and out of China. The requirements are as follows:
1. A group visa application letter from local travel agency, like this travelchinaguide.
2. Confirmation fax or letter with Group Code from tourist bureau of China or an authorized travel agency in China.
3. Original valid passports and one photocopy of the front page of the passports of the group members.
4. Three copies of properly completed and typed List of Tourist Group.
Generally, it charges 1300 Rupees per person for single entry, and it takes 5 working days for visa processing.