CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Nov. 30, 2011	Nov. 30, 2010
Cash flows from operating activities
Net income (loss)	$ 5,322,236	$ 9,393,023
Adjustments to reconcile net income (loss) to net cash provided by (used in) operations:
Loss from property, plant and equipment disposal	0	8,877
Bad debt expenses	159,655	0
Depreciation	792,117	873,212
Shares issued for compensation	845,000	393,950
Stock option expenses	492,085	347,923
Changes in operating liabilities and assets:
Trade accounts receivable	(14,979,855)	(11,812,272)
Prepayments	789,984	(3,637,611)
Inventories	(237,620)	56,639
Other receivables	821,849	311,844
Deferred tax assets	137,084	0
Trade accounts payable	6,515,549	2,710,530
Other payables	112,389	1,599,842
Accrued expenses	70,764	23,230
Tax payable	2,737,013	1,024,659
Net cash provided by (used in) operating activities	3,578,250	1,293,846
Cash flows from investing activities:
Property, plant, and equipment additions	(4,336,823)	(336,332)
Property, plant, and equipment disposal	0	37,135
Payments to related party receivable	0	(93,000)
Proceeds from related party receivable	0	31,751
Net cash provided by (used in) investing activities	(4,336,823)	(360,446)
Cash flows from financing activities:
Cash contributed by non controlling interest of Laoting	908,599	0
Restricted cash	10,567	76,680
Proceeds from Bank loan payable and capital lease obligations	6,074	31,111
Payment to Bank loan payable and capital lease obligations	0	(1,902,024)
Proceeds from related party payable	0	540,894
Payments to related party payable	(16,927)	0
Net cash provided by (used in) financing activities	908,313	(1,253,339)
Effect of rate changes on cash	3,471	20,530
Net Increase (decrease) of cash and cash equivalents	153,211	(299,409)
Cash and cash equivalents-beginning of year	136,702	1,102,879
Cash and cash equivalents-end of period	289,913	803,470
Supplementary cash flow information:
Interest paid in cash	1,637	102,044
Income taxes paid in cash	0	0
Non-cash investing activities:
Acquisition of property, plant and equipment through other payable	3,312	0
Disposal of property, plant and equipment through long-term investment and accounts payable	1,038,629	0
Related party receivable offset by payable to related party payable	$ (272,690)	$ 0