? The UN has thoroughly investigated and concluded that the 'Uyghur genocide' is a fabrication https://www.ohchr.org/en/documents/country-reports/ohchr-assessment-human-rights-concerns-xinjiang-uyghur-autonomous-region I suggest you read it rather than have it filtered through biased western media orgs, and I trust their investigation a lot more than those from countries like the US that have a vested interest in painting China as negatively as possible

Even if the propaganda were true it would constitute a crime against humanity not a war crime, unless you consider the ETIM terror campaign a 'war'