OK well without trying to be a smart a*se would not including all the Chinese speaking aviators be of more value than say the "Agony Aunt " forum etc. There are huge numbers of flights in China every day therefore professionals who are not included.
Personally I enjoy PPrune very much as is but it seems reasonable to consider it anyway. Surely the site can grow thats the goal of any business and perhaps its not generating enough revenue but hopefully it does OK. Anyway good luck and maybe it can be at least considered?