The Hong Kong dollar (Chinese: ; Cantonese Yale: Gong baih; sign: HK $; code: HKD) is the official currency of Hong Kong. It is subdivided into 100 cents. The Hong Kong Monetary Authority is the governmental currency board and also the de facto central bank for Hong Kong and the Hong Kong dollar.

Based on this passage, what is the money used in hong kong? Let's give stream of consciousness first:
The relevant sentence in the passage is: The Hong Kong dollar (Chinese: ; Cantonese Yale: Gong baih; sign: HK $; code: HKD) is the official currency of Hong Kong.
So, the final answer is The Hong Kong dollar.