For people who knows chinese, or got a good translator.
A stream (starting around 1 hour 10 min) about night vision equipment (but intro to it, but also a lot about it's usage and the likes in PLA), and also other topics around PLA small arms.
Lastly, there's a pretty big '爆论' at the last 20 minutes.
Apparantly, some of them claim that US small arms equipment is getting sold on the blackmarket at the 10k+ scale (so like directly from warehouses), and that one can get the 'full equipment' for 10-15k yuan.
Imo, not improbably, especially when one looks at US discipline and past history (examples being US military involvement in drug dealings in say SK and other places).