The problem with China stocks is that the CCP doesn't give a f*ck about shareholder returns. There's no reason to expect listed companies to provide anything at all in the way of distributed profits for the foreseeable future, at the very least while Xi Jinping is in charge.
There's also the very real prospect of open war between China and the USA/West within the next decade - I'd assign this at least a 50% probably, in which case any positions you own in China/HK stocks or other China-based assets will be zeroed out.
Buying low is all well and good, but sometimes cheap stuff is cheap for excellent reasons, and may in fact still be expensive. Just ask the guys stuck holding Russian shares which looked so attractive at 10%+ earnings yields. Personally I"d consider buying China stuff at a dividend yield (not earnings yield) of 15%, and would definitely put some money in at 25%, but FXI yield is currently like 350bps.