What doccuments need for Buisness visa multiple entry,i all ready visit in china arround 8-10 times.

The requirements for a business visa is: passport, passport photo, visa application form V2011A, duly authorized invitation letter and other deemed necessary documents by the consular officers. If you want to apply for a multiple-entry visa, provide your previously used China visas on your new or old passport as well. It may be help. But I cannot guarantee you'll definitely get it. If you have direct relatives or apartment in China, the chance for you to get the multiple-entry china visa is even greater.