According to Virgin Atlantic, I can apply for HKG's E-Channel if I'm gold.
http://www.virgin-atlantic.com/en/gb...fits/index.jsp
You can now register for a fast-track Immigration channel at Hong Kong Airport. Once you’re set up, the e-Channel will save you time if you travel to Kong Kong frequently.
Once you arrive in Hong Kong, you will need to register for the service by visiting the Frequent Visitor e-Channel Facilities in the Arrivals Hall. You will need to present your Flying Club membership card, and a valid travel document such as passport and or multiple visit visa. The enrolment process will include fingerprint and photograph capture, and document verification.
Once completed, you will simply be able to scan your travel document, submit your fingerprints for verification, then collect a label and fix it to your passport. Then you will be on your way to completing the self-service immigration and collecting your bags.
My questions -
Arrival hall facility is before or after custom? If they're closed, is there anywhere else I can apply after custom?
How long will this pass last?
Can I use E-Channel elsewhere with this pass (like Macau or China)?