Many Western have unrealistic expectations of China WeChat. For example, WeChat will play a vital role in China digital marketing. Some people think WeChat is the Chinese Facebook that all Chinese like to use.
In fact, there is a very big difference between WeChat and Facebook. You can query people based on certain filters on Facebook, and then optionally link them as friends. However in WeChat, there is no such function. The connections in WeChat are all friends in your address book. This also determines that it is impossible for you to find the target and establish connection according to the characteristics of your target customers.
Of course, you can run ad campaigns on WeChat. This is a matter of advertising.