I haven't perused that list for quite some time. It makes for some enlightening reading. 1876 nodes in the US. 96 in China. 3 in the whole of India. Malta has more.
I'd say the low number of reported chinese nodes is due to the version message from bitnodes.21.co:0.1/ not getting through the GFC or the response timing out. Im sure the ones that do respond are cleverly proxy'ed.