中美贸易战、孟晚舟被捕和首位基因编辑婴儿是2018年微信被删最多的话题。
https://globalvoices.org/2019/02/11/censored-on-wechat-a-year-of-content-removals-on-chinas-most-powerful-social-media-platform/
https://www.cnbc.com/2019/02/15/most-controversial-topics-on-tencents-wechat-in-2018-report.html
WeChat's most censored topics in 2018 include US-China trade war, Huawei CFO arrest: Report
http://time.com/5528362/china-wechat-censorship-wechatscope/
The U.S.-China Trade War and #MeToo Were Among the Most Censored Topics on China's WeChat, Report Finds
