From The NY Times:
A letter to President Donald Trump’s top advisers signed by more than 40 lawmakers said China’s actions in its western region of Xinjiang “may constitute crimes against humanity” and urged tighter U.S. export controls to ensure that U.S. companies are not assisting the Chinese government’s crackdown there, either directly or indirectly.
It also asked the United States to strengthen financial disclosure requirements to alert American investors about the presence in U.S. capital markets of Chinese companies that are “complicit in human rights abuses.” The letter specifically cited Hikvision and Dahua Technology, which produce audio-visual equipment that can be used for surveillance.