Immediately seems very sus that there doesn't seem to be any muzzle flash, gunshots, or even guns from what I could see. Yet there's gunshot sounds from the beginning. There also doesn't seem to be any dead people, few injuries, yet the commentary acts like there's loads.
Does someone know if they're even translating the Mandarin correctly?
Found in a Reddit thread about Tiananmen Square
I don't know what was fired at in the video but it's consensus among basically all the parties that the PLA shot up the protesters' sound systems. So that is one option.