On January 9th, 2019, WeChat, China’s largest multi-function messaging app with more than one billion active users, released a big data report that revealed the growth of users over the past year and the distinct characteristics of each user group.   By September 2018, WeChat’s monthly active users had reached nearly 1.1 billion. They sent about 45 billion messages throughout the year, an increase of 18% compared to 2017. The number of voice calls and video messages was 410 million, which represents a growth of 100% over the previous year. “WeChat users have their own ways of talking, and...