Pledged deposits (Tables)

3 Months Ended

Mar. 31, 2018

SCHEDULE OF PLEDGED DEPOSITS [Table Text Block]

		December 31,		March 31,
		2017		2018
Pledged deposits with bank for:
Bills payable	$	123,116	$	1,166,272
Letters of credit		7,685,213		7,967,747
Others*		1,295,849		1,343,488
	$	9,104,178	$	10,477,507