In this Oct. 29, 2019, file photo visitors look at the surveillance cameras by China's telecoms equipment giant Huawei on display at the China Public Security Expo in Shenzhen, China's Guangdong province. Sam Brownback, the former U.S. envoy for international religious freedom during the Trump administration, said Wednesday that China's use of high-tech tools to repress its religious minorities will lead to more authoritarian crackdowns around the globe. (AP Photo/Andy Wong, File)
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