Uses and gratifications of social media: a comparison of microblog and WeChat:
https://www.emeraldinsight.com/doi/abs/10.1108/JSIT-06-2015-0052?mobileUi=0&journalCode=jsit
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How WeChat, the Most Popular Social Network in China, Cultivates Wellbeing:
https://repository.upenn.edu/cgi/viewcontent.cgi?article=1066&context=mapp_capstone
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A study of WeChat communication protocol:
https://blog.csdn.net/zhangmiaoping23/article/details/52668636
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WeChat App Communication Protocol Case Study Reference Guide:
https://blog.chatie.io/wechat-protocol-reference-guide/
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Research on WeChat Interaction Protocol and Encryption Mode
file:///Users/lu_l/Downloads/wechat.pdf
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Since there are not many paper about WeChat communication technologies on Google Scholar, I find most of the information on Chinese blog and this will guide my research of protocols WeChat use.