People's Liberation Army

The People's Liberation Army is the armed wing of the Communist Party of China. In post-apoc, following the collapse of civil authority in China, the People's Liberation Army has served as a provisional military government in many regions. Regions of note include the Beijing region or command, the Nanjing region or command, and the Dongbei (Manchurian) command... and probably another command that I've forgot about that's somewhere in Central China. I forgot!
The PLA considers itself to be the legitimate government of all China and considers itself to simply be restoring order to the People's Republic of China... thus it considers its authority to be of the People's Republic of China.
The PLA's internal factions are not opposed to one another, but are limited in their ability to interact with each-other. The People's Liberation Army Navy (which has two factions in Guangdong and in the Bohai Sea) is nominally under the jurisdiction and control of the PLA, but in practice the PLAN is independent from the PLA's command.