Hi there
I'll share our story (briefly).
We found out that we were unable to have kids naturally, and after some soul searching, decided to adopt.
We used Po Leung Kuk after a recommendation from a friend. I think most foreigners tend to use Mother's Choice though.
The adoption process follows the UK quite closely. You can sign up for a free briefing session with the social welfare department and they'll give you a detailed run down of the process. Very simply, the process is:
1. Pre-application: the adoption organisation (e.g. PLK) assesses your suitability, you'll be asked to attend some of their sessions, you get assigned your social worker.
2. Application stage - you formally submit your application (with hundreds of supporting documents!), and it takes 3-4 weeks for them to accept the application or turn it down. Assuming they accept it....
3. Home assessment - they'll interview you and partner over and over again and come to your home a few times to assess the suitability of your home. Assuming everything goes to plan...
4. Approval and entry onto waiting families list.
5. The social workers meet once every three weeks and match children to waiting families.
As for us, we too are foreigners. Our social worker told us it would take a couple of years to be matched because locals have first priority.
We submitted our formal application (I believe) end of september, assessments completed december and we were placed on the waiting list just before Christmas.
In the February matching (i.e. six weeks from being entered) we were matched with a beautiful baby girl who is now living with us. From start to finish it has felt like a fairytale - I don't know whether we were extremely lucky, or the social workers painted a picture far worse to manage our expectations, but it was such an amazing process from start to now.
There is an organisation called Adoptive Families of Hong Kong. We have met some really nice people through it. We went to some film nights etc during the application stage and they were all very supportive.
Anyway, hope this helps. Good luck.