Property, plant and equipment, net, comprise:

 

		At December 31,
		2016			2017
Buildings		$	282,000		$	282,000
Plant and machinery			4,873			1,097,710
Motor vehicles			-			50,971
Office equipment			50,170			39,247
Power stations			23,170,604			125,753,462
Less: Accumulated depreciation			(3,354,205)			(8,388,858)
			20,153,442			118,834,532
Construction in progress			5,147			35,824,545
Property, plant and equipment, net		$	20,158,589		$	154,659,077