Value investing has been widely researched and applied to many fields of stock market analysis. It involves the identification of undervalued stocks for possible purchase and subsequent resales. In this paper, quantitative methods are employed to examine the extent and nature of value investment in China's manufacturing industry. The research aims to discover the relationship between ROI (return on investment) and the historic financial indices documented in financial statements, while also examining the extent of the influence on ROI in China's manufacturing industry.