hey Crystal,
have you tried connecting with local HK groups? Maybe you can find someone through contacting
https://gogreenhongkong.com/about/ or some of the other local social hubs.
There are definitely people who've done PDCs in HK. Several years ago I visited a few organic farms in the new territories following some 'permacultural' practices, not sure if they still around though. ie 有心機 zen Organic farm
gl, I'd be interested to know what you find. I've had friends ask me about a Cantonese/Chinese friendly PDC also but I've never seen anything.
JC