For one reason or another I'm talking to myself here, but please keep in mind that Jinko is the market leader in China, which is already the largest market for solar panels by some distance, and combine that with the following:
China, the world’s biggest carbon emitter, plans to speed up solar power development, targeting a more than tripling of installed capacity to 70 gigawatts by 2017 to cut its reliance on coal. The goal would be double a previous target set for 2015
China Targets 70 Gigawatts of Solar Power to Cut Coal Reliance - Bloomberg
Now keep in mind that the earnings "disappointment" of (20c instead of 40c) the Q1 figures would change into a whopping earnings beat (75 cent) if not for some unexpected foreign currency loss. Also consider that Jinko is the cheapest panel maker (47 cent per watt) and has the highest gross margins of 26%.
Even after the rally of the last two days, the shares are still quite far from the top earlier in the year and they still go for a single digit multiple.