The U.S. has warned investors about the risks of doing business in Hong Kong, issuing an advisory that said China’s push to exert more control over the financial hub threatens the rule of law and endangers employees and data.

A senior official in the administration of U.S. President Joe Biden said developments over the last year in Hong Kong present operational, financial, legal, and reputational risks for multinational firms that necessitated the advisory, issued Friday by the State and Treasury, Homeland Security and Commerce departments.

The business advisory underscored how swiftly China’s push for more control over Hong Kong has brought an end to the "one country, two systems” approach that Beijing had promised when it took back control of the former British colony in 1997. That’s proved a death knell for the island’s independent judiciary, pugnacious media and lively protest movements.