What is the difference between a tourist visa and a business visa?

 Visas are issued to permit entry into a country for a specific purpose: to allow travel for leisure, or to conduct business activities. In general, 'tourist' visas are issued specifically for the purpose of travel for pleasure, while a 'business' visa generally permits a traveler to engage in normal business-related activities. You need a supporting letter to apply for business visa. However, there is no distinctive line between tourist visa and business visa. In another word, tourist visa will not prevent you from conducting business in China.