You have a point. China is going wild on call. In industrialised countries, coal is being pushed out though. (Your graph shows the US and Germany.)
So it's do-able, but we haven't quite reached the tipping point yet in China.
The thing is: I am confident that Solar will push out Coal, even in China.
China is building a lot of new factory capacity for PV modules. Factory capacity is proportional to the acceleration of PV power production: It's a second derivative. The more battery capacity gets added, the faster PV capacity will start growing. The more PV capacity grows, the more clean power will be produced, competing with coal.
http://www.earth-policy.org/mobile/releases/highlights47
