I had coffee with a friend today (it appears that I have been doing quite a bit eating and drinking in Hong Kong).
One suggestion is to send Chinese manuscript of my book to publishers via referral that I may have. First, it will solve the sales and marketing issue which will be more acute in Mainland China since I am not there physically and have very limited contacts there. Second, the sunk costs of self-publishing are too higher in China. For example, the registration of ISBN serial number is close to 1,500 USD in China vs. free in the UK.