In Hong Kong, the trademark is in accordance with previous cases related to Goodwill, "the Trade Marks Ordinance" protected by common law. As the "one country two systems" is a registered trademark in China alone is not protected by laws of Hong Kong, and simple is a registered trademark in the Mainland, Hong Kong is also not protected by law. A trademark for the two places should have registered in both places.
Hong Kong trademark Requirements
Hong Kong trademark registration process