I have 6 plus years of digital marketing in China on WeChat, QQ and baidu. WeChat is the one of leading Messenger App in China and its daily active users are 9,000,000 plus, people uses it for connecting with one another, finding jobs, business, services and friend. it has very specific way to promote anything, you can use it for your needs in your way. it has Groups but not Spam like Facebook and other social media. it has service and subscription accounts too.