[datura]

As soon as the WuJing get there, it’s over. (CCCP Secret Police, armed). Yeah, the same units that put down all those protesters in 1989.

[Zhang Fei]

[As soon as the WuJing get there, it’s over. (CCCP Secret Police, armed). Yeah, the same units that put down all those protesters in 1989.]

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Regular army units were used at Tiananmen Square.
https://en.wikipedia.org/wiki/Tiananmen_Square_protests_of_1989#June_3%E2%80%934:_clearing_the_square

The People’s Armed Police are basically the equivalent of Soviet Interior Ministry MVD units. They are a combo of coup insurance (in case an army honcho gets ideas and somehow manages to corral enough support from other army chiefs to make a bid for power) and riot control.

[PIF]

Those were mountain troops (the ones with tanks and heavy weapons firing continuously for 48 hours with armor piecing rounds) in conjunction with the CCCP.