Wechat is very popular nowadays, even the foreigners are crazy about this communicative tool. The functions of Wechat are various, such as talking to friends and paying the bill.
Wechat has been the very popular communication tool, and many foreign people have also used it. Wechat is more private than other social soft-wares, which makes it be favored by many users.
Since the policy of Reform and Open in the last century, Chinese economy develops so rapidly. At the same time, the technology catches up with the world.