China is sterilising Uighur women in Xinjiang in order to suppress their population:
Chinese authorities are carrying out forced sterilisations of women in an apparent campaign to curb the growth of ethnic minority populations in the western Xinjiang region, according to research published on Monday.
The report, based on a combination of official regional data, policy documents and interviews with ethnic minority women, has prompted an international group of lawmakers to call for a United Nations investigation into China’s policies in the region.
Genocide is defined in international law in both the 1948 Convention on the Prevention and Punishment of the Crime of Genocide and the 1998 Rome Statute of the International Criminal Court
any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such:
(a) Killing members of the group;
(b) Causing serious bodily or mental harm to members of the group;
(c) Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part;
(d) Imposing measures intended to prevent births within the group;
(e) Forcibly transferring children of the group to another group.
[Emphasis added]
China is not a party to the Rome Statute - it fears international law. But it is a party to the 1948 Convention, having assumed the signature of the former Republic of China. It - and members of its regime - are thus subject to international jurisdiction for this crime. And they need to be investigated and prosecuted for it.