This paper provides case studies for the Public-Private Partnership (PPP) mode in China. The key to promoting the PPP model lies in introducing social capital into the infrastructure and public utilities sector, in order to strengthen the supply level of public goods and improve the quality and efficiency of public services. Since the 1980s, China has embarked on the journey of introducing the PPP model, actively exploring and innovating in the continuous practice, and also emerging a number of more successful examples, but there are also some cases needed to be revisited. More importantly, in key infrastructure fields such as transportation, energy, and water conservancy, the PPP model is playing an indispensable role and becoming a key pathway for financing and construction. This model not only helps alleviate the financial burden on the government, but also significantly promotes the smooth implementation of large-scale projects.