Chinese guy I know spent a few years working the stock markets. He got married and stopped.
Anyway, what he used to say is the stock market in China was all about the invisible forces - basically local and national agencies and individuals manipulating just about everything and reporting almost nothing. You had, he used to say, to know which way the wind was blowing without ever seeing the sky. You had to be able to read the signs of market distortion and make some alternative bet about what that meant for real results.