This study tests the impact of B2B Guanxi behavior among Korean Suppliers and Chinese manufacturers located in Hong Kong and Guangdong province in China. Appropriate Guanxi behavior is very important when conducting business. It also can bring extensive benefits from the business. In other words, it can be a kind of Insurance on uncertainty environment in China. I found that emotional Guanxi between channel-boundary personnel of firms has a positive impact on their exercise. It is also more powerful than instrumental Guanxi. But, we must understand the difference between Guanxi and Relationship. Many people misunderstand this point in their business and make mistakes which causes trouble from their business. The Chinese mentality is big different from western or even most of Asian country. So people must understand philosophy of Chinese old generations. I hope to have the opportunity that this study can be helpful to the people related to business in China.