This report is an analysis of the types of content removed by WeChat on its public accounts (also known as “official accounts”) blogging platform.

This post describes our analysis of China’s “Great Cannon,” our term for an attack tool that we identify as separate from, but co-located with, the Great Firewall of China. The first known usage of the Great Cannon is in the recent large-scale novel DDoS attack on both GitHub and servers used by GreatFire.org.

We investigate what keywords might trigger censorship via automatic review in Sina Weibo and followed the pathways a typical censored post might take on Chinese social media.

This report is part of a series which analyzes regionally-based keyword censorship in LINE, a mobile messaging application developed by LINE Corporation. The most recent update to the censorship keyword list include a number of new entries as well as the introduction of regular expressions for more advanced keyword matching.