Here seems to be a good analysis of the 6.7% figure by Christopher Balding on FT Alphaville, and apparently it doesn't match the constituent granular data: http://ftalphaville.ft.com/2016/08/02/2171409/guest-post-fur... Also, direct comparisons between China's and US's GDP growth rates are usually very flawed or misleading because of differences in how developed those two countries are; it's a tricky/unsettled matter, but 6.7% > 2.2% does not imply anything much, because it should be much easier for China to grow before it reaches US's levels of wealth.