Whenever you are looking to research what is happening in a particular place for the SDGs or simply sustainability in general, then it is always a good idea to find out what the official government position is and what resources the government provides. In Hong Kong the government website has an environment section which covers a wide variety of areas. These give you information about what Hong Kong is doing to encourage and promote sustainability, tell you what policies and government departments are involved and give pointers on non-government initiatives. You can use this as a good place to get ideas and start of lines of enquiry.
Genius is one percent inspiration and ninety-nine percent perspiration.