Many international businesses assume a China trademark covers Hong Kong. This is not the case. Hong Kong operates its own independent trademark system under the Trade Marks Registry.
Similar to China: search, file, examination (4-6 months), publication (3 months), registration. Protection validity is 10 years from filing date. Note: Macau and Taiwan also require separate registrations.
We recommend including Hong Kong, Macau, and Taiwan in your Greater China IP strategy.