Long-time online commentator Sun has a been a vocal critic of the Chinese Communist Party since 2014. In May 2020, he was arrested on suspicion of “inciting subversion of state power” for content posted on WeChat and Twitter between 2014 and 2019. He is accused of slandering the social system, party, and state leaders and policies. A court hearing was held in December 2022 but no verdict was announced.