China has been leaning on American know-how to build a sprawling surveillance program in Xinjiang province, according to the New York Times. Scientists working with Chinese police have been using equipment from Thermo Fisher, a supplier of biotechnology tools in Massachusetts. They also shared genetic survey data with Kenneth Kidd, a geneticist at Yale University. The genetic data was being used to be able to determine, from a blood sample, if someone had Uighur ancestry. Chinese scientists even filed a patent on the idea.