Background On January 31, 2018, the China Internet Network Information Center (CNNIC) released the 41st Statistical Report on China's Internet Development in Beijing. By December 2017, the number of Internet users in China reached 772 million, accounting for 55.8% of the total population, which exceeds the global average (51.7%) by 4.1% and the Asian average (46.7%) by 9.1%. The rapid development of digital technology and Internet has changed the traditional model of interpersonal interaction. The "Hyperpersonal Communication" model states that people who are engaged in computer-mediated communication may experience greater levels of intimacy, unity and liking than face-to-face interaction users [1]. Online interpersonal interaction demonstrates the relationships of social groups on Internet platforms. It is a practical activity that shares knowledge through digitized and symbolized information among the highly integrated societies and individuals online and in the real world. WeChat is the most popular and widely used social platform app in China. Based on an analysis of WeChat user data, the WeChat Users & Business Ecosystem Report 2017 showed that by December 2016, there were about 889 million active WeChat users every month, and those users spent 1967 min on average on WeChat each month. About 45%
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