8R.Koopman,Zhi Wang, Shang-Jin Wei, 2008, "How much of Chinese exports is really made in China? Assessing domestic value-added when processing trade is pervasive" ,[J]. NBER.
9Il Houng Lee, Murtaza Syed, and Liu Xueyan, 2012, "Is China Over-Investing and Does it Matter?" IMF working paper.