(HONG KONG) — Prominent Hong Kong democracy activist Nathan Law has left the city for an undisclosed location, he revealed on his Facebook page after testifying to a U.S. congressional hearing about a tough national security law China had imposed on the semi-autonomous territory. In a post late Thursday, he said that he had decided to advocate for Hong Kong internationally and had left the city. “As a global-facing activist, the choices I have are stark: to stay silent from now on, or to keep engaging in private diplomacy so I can warn the world of the threat of Chinese authoritarian expansion,” he said.