This research is to analyze the growth and evolution process of the Chinese enterprise group in China market place base on longitudinal perspective. In accordance with the finding of this study, we propose an integrated process model to explain the growth path and so does the dynamic mechanism among these dimensions in the model. The findings of this study are stated as below: 1. The integrated model of the evolution process Through the case study of Chai-Tai group in China, we consider the evolution and growth process is part of its internationalization activities. The dynamic interaction among the three dimensions of this model and the path dependence of each stage constitute the characteristics of this model. 2. The meaning of the un-related diversification strategy The growth strategy of the Chinese Business groups is deeply affected by their specific social network or guanxi, entry timing and the industry/business environment situation. Un-related diversification is a common selected strategy of these Chinese business groups. But they are usually suffering from the delusion of business focus and cannot produce synergy from the un-related business units. Consequently, the un-related diversification strategies are without benefits for the enterprises to maintain their market position and develop their core competences.