As globalization continues to deepen, international brands are increasingly turning their attention to the vast Chinese market. With the largest number of internet users in the world and a digital advertising market size that ranks at the forefront globally, programmatic advertising, as an essential means of digital marketing, is gaining increasing attention. This article will delve into the development history of China’s programmatic advertising ecosystem, analyze its main players and functions, compare it with the foreign ecosystem, and finally provide strategic recommendations for foreign advertisers entering the Chinese market.