China said Wednesday it was “willing to engage” with the UN Human Rights Office over its northwestern Xinjiang Uyghur Autonomous Region but rejected efforts to “smear” its policies there. The UN rights office (OHCHR) warned on Tuesday that “problematic” policies persist in Xinjiang Uyghur Autonomous Region, two years after its bombshell report citing possible “crimes against humanity” in the region. China has been accused of incarcerating more than a million Uyghurs and other Muslim minorities in the region, charges Beijing vehemently rejects.