This is patently absurd. That China would have a "willingness to kill half it's population" is something that only the heavily propagandized would believe.
Reconsider your ethics.
https://en.wikipedia.org/wiki/One-child_policy
Didn't the cultural revolution lead to mass starvation?
https://en.wikipedia.org/wiki/Great_Chinese_Famine
Oh and they currently do organ harvesting on prisoners (aka people who are undesirable)
https://u.osu.edu/mclc/2022/01/31/chinese-official-leaks-fac...
Idk they seem pretty able and willing to commit genocides