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5. Property and equipment (Details Narrative) (USD $)	3 Months Ended
5. Property and equipment (Details Narrative) (USD $)	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Property And Equipment Details Narrative
Depreciation expense	$ 807,389	$ 882,815
General and administrative expense	4,631	22,224
Bank loans	$ 21,221,099		$ 21,155,359

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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