Here is a document from HK Air Traffic Control, ENR6 (HK AIP), includes the FIR map, transition routes and communication facilities map (sector map). Hopefully this could help all listeners to get a picture of the airspace as they listen to both VHHH feeds. http://www.hkatc.gov.hk/HK_AIP/AIP/ENR/HK_ENR6.pdf
The rest of the AIP can be found here, including charts for Hong Kong Int'l (VHHH). http://www.hkatc.gov.hk/
Thanks for listening to VHHH feeds.