This would be business as usual in China. Mao is credited with 80 million deaths but the Rebellions of the 19 century killed or caused to die 100 million or more.
When I studied this period. The number of death attributed to Mao by researchers was between 15-30 million. I have since heard 50 and now 80 million, but these seem to be just numbers being thrown around.
In the 19th century Chinese population contracted dramatically from wars and famines. This will likely continue with no unification. Probably hundreds of millions of people will also not be born. Whatever ideology that unifies China after this extend period of strife will unlikely be a kind and gentle one.