In April 2017, a previously unknown group calling itself IntrusionTruth began releasing blog posts detailing individuals believed to be associated with major Chinese intrusion campaigns. Although the group’s exact motives remain unclear, its initial tranche of information exposed individuals connected to long-running GOTHIC PANDA (APT3) operations, culminating in a connection to the Chinese firm Boyusec (博御信息) and, ultimately, Chinese Ministry of State Security (MSS) entities in Guangzhou.

https://www.crowdstrike.com/blog/two-birds-one-stone-panda/