My guess (and this is just a guess based on my China experience) is that they may indeed have the PPA approval but it needs to be "chopped" (red stamp) by several different departments, which would include the construction approval bureau. Doing business in China is a nightmare because your timetable is at the mercy of the whims of officials. A nice meal out can accomplish alot... maybe they need to grease the wheels a little with a nice official banquet.
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