Very misleading and dishonest article.  China's use of coal has not gone down.  They are still polluting as much as ever, burning over 4 billion tons a year.   What is happening, though, is that China is now developing alternatives for generating electricity.  They have built a number of new hydro-electric dams, and are focusing on developing new nuclear power technology.   Even with this, the overall percentage of their electricity that is generated by coal has only decreased slightly.

China burns almost as much coal as the rest of the world combined.  The damage that they have done to the world's environment is immense, and has been disastrous for the world's climate.  And they have been caught lying about how much coal they use.  Here is a report by the NY Times about the reality of coal in China:

https://www.nytimes.com/2015/11/04/world/asia/china-burns-much-more-coal-than-reported-complicating-climate-talks.html?_r=0