Below is a list of web resources in China where you can get directory information on nonprofits in China, and the citizen sector as a whole.  Most of them are in Chinese.

• Directory of International NGOs in China (English and Chinese)
  
• Directory of Local Nonprofits in China (In Chinese)
  
• Directory: Social Enterprises in China (English and Chinese)
  
• Website Index for Most Nonprofits in China (Some links lead to English contents)
  
• China based organizations listed on Idealist.Org (In English)
  

Please post it in Comments when you find new resources recommendable.