tax incentives and subsidies.
It is a calculated and intentional economic inefficiency, which is deemed worth the cost, in order that the CCP plenum may avoid getting their heads lopped by people with nothing to lose because all of their progeny died of autoimmune reaction to inhaling coal ash.
The poly solar business will die, but only when a sufficient amount of economically productive, greener generation cap is available to provide an reasonable level of insurance against such an outcome, or the reins of power are seized by a new dynasty with post-urban social engineering agenda.
Sorry to do this to you, but you didn't check your facts:
http://en.wikipedia.org/wiki/Electricity_sector_in_China#Recent_historyTotal installed capacity in 2013 was 1247 GW.
Solar power capacity was 18 GW.
Again I repeat, China's Solar Debacle.
Sorry if I wasn't clear. It's not about generating power. It's about keeping your head, literally, on your shoulders.
It started as a play on European subsidies. When those were lost, it morphed into a pure political theatre. Wind is not such a money sink. Nuclear can actually produce useful power. But they need every last drop of employment, and they need a greenwash. Solar provides those. Most importantly the last.