In 1917, China Art Enamel Factory (China Enamel Ware Manufacturing Company) was officially established, which was the first enamel factory run by Chinese people. In the following ten years, Yifeng, Huafeng, Jiuxin, Zhaofeng and other enamel factories successively opened in Shanghai, a place of cultural exchange between old and new. A large number of domestic enamel products were brought to the market, and the product varieties were continuously enriched, which directly affected the original market of the enamel factories of Yang Shang and Hua Yang joint venture.