evidence: USTR's Office of China, Mongolia and Taiwan Affairs is responsible for managing the formulation and implementation of U.S. trade policy for the People’s Republic of China, Hong Kong, Macao, Mongolia and Taiwan, with the goal of increasing access for U.S. products and services in these markets and ensuring that World Trade Organization (WTO) and bilateral commitments are enforced. [...] Hong Kong is a Special Administrative Region of the People's Republic of China. It operates as a separate customs territory. Macau is a Special Administrative Region of the People's Republic of China. It operates as a separate customs territory.