I used to spend alot of time looking for chinese tabs all over the place - from the internet, scores from the esplanade library, friends, etc.
Now I transcibe them myself. With some understanding of music theory and developing a good ear for the bass line, you should be able to do it yourself.
I am looking for people who likes Chinese pop to make music together as a hobby. My playing skills are only ordinary. PM me - maybe we can progress together.