That units commanding officer(s) needs to be questioned and or dismissed for operational security lapses. As
@ACuriousPLAFan correctly stated, that alleged former PLA soldier could have seriously jeopardize the security of the entire unit and or command if both internal and external forces were to attack.
I am surprised to know though that the alleged soldier is familiar with all the anti-China talking points and well versed on western lingo. For a fella that was deep within the PLA force he sure talks, sounds like your run on the mill western anti-China hater.