The United States has blacklisted 28 Chinese companies, government offices and security bureaus over their alleged role in China’s mass imprisonment of Muslim Uyghurs and other minority groups in the far western region of Xinjiang. The U.S. Commerce Department said, “These entities have been implicated in human rights violations and abuses in the implementation of China’s campaign of repression, mass arbitrary detention, and high-technology surveillance.” The move comes days before trade talks between the U.S. and China.