With the development of China's economy, more and more Chinese firms started multinational operation. Different with the developed countries’ multinational firms, the multinational level of Chinese firms is obviously still in the development stage. In China's academic research, many scholars have studied the relationship of firms’ M-P (multinationality-performance). Like other academic studies in developed countries, they have also drawn various results, such as linear relationships, nonlinear relationships (S-shaped, U-shaped, inverted U-shaped, W-shaped, etc.). This paper uses the panel data of 242 multinational firms listed in China's A-shares from 2008 to 2016. The empirical research method is used to study the relationship between market indicators, accounting indicators and M-P, and the firm's asset management efficiency is also studied. The empirical results show that market indicators and financial indicators have both a significant positive effect on M-P. Whereas, the asset turnover rate plays a negative role in regulating M-P. It shows that Chinese manufacturing firms can accelerate the process of multinationality by expanding the market and managing corporate finances.