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Taxes Payable (Details)	3 Months Ended
Taxes Payable (Details)	Aug. 31, 2012	Aug. 31, 2011 Minimum	Aug. 31, 2011 Maximum
Business tax rate		3.00%	5.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	25.00%

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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