In VN, Chinese manufacturers tend to compete directly with SK and JP FDI, so the RoI isn't too hot, and Chinese manufacturers face the same hurdles American manufacturers faced when entering China (eg. Forced JVs, ToTs, etc)
SK - South Korea
JP - Japan
FDI - Foreign Direct Investment
RoI - Return on Investment
JV - Joint Venture
ToT - Transfer of Technology ?
Informative, though!