The number of Internet users in China reaches 1 billion and, with all diversity of the Chinese Internet space, its lion's share is taken by social networks. Once former messenger services, today they represent the entire ecosystems, where the standard functionality is closely intertwined with online payments, retail and games.
The Chinese social networks, of which the most popular are WeChat platform and WeiBo microblogging service, are exclusively local in nature and popular only among the Chinese; they cover an audience above one billion which is comparable in number to WhatsApp or Viber and Telegram combined.
This coverage is explained by blocking the most popular Western social platforms such as Facebook, Twitter and Instagram; however, these were easily replaced with WeChat, WeiBo, Douyin and other ones that combine functionality of messaging services and social networks.
Therefore, if you are going to target the Chinese market, advertising on local social networks is the main tool for popularizing and promoting a product or service.