OkCupid, launched in 2001, is the major free dating sites with the largest database worldwide.
it is also popular for its matching systems based on Questions and Answers. So the more questions you answer the better the matches that you get are.
OkCupid has a great audience in Hong Kong. Most of the foreigners in Hong Kong and locals with international background are there. Literally, all Hong Kong singles are there.
Most of the profiles have full information, and most users do spend a lot of time on the site.
Okcupid is free, so you can find all sort of people and have to be very selective to make sure you won’t end up meeting a scammer.
There is a paid option as well, which allows anonymous profile visits and gives you more filtering options.
But free option works just fine!