Side note: I've never seen an account quite like that one before.
From their recent uploads
> Armed police forces preparing to take on the violent anarchists and trotskyists on the streets of Hong Kong. Drill took place 29 August in Shenzhen, just over the border from Hong Kong.
I'm quite familiar with anti-imperialists of various sorts. They generally don't start ranting about Trotskyists. That makes this person sound decades out of date.