In 2018，startups，investment and financing were active in the field of mobile social networks. Both acquaintances and stranger social networks released new applications. Short video social applications such as Tik Tok and Kwai，with the attributes of “short video+algorithm push+mobile social network”，have opened up a new mobile social circuit and achieved explosive growth in 2018. Social networks and overseas market expansion were booming. Under the influence of new technology and new markets，the pattern of mobile social applications have changed.