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v2.4.1.9

INCOME TAX (Schedule of Effective Tax Rate) (Details) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Schedule Of Effective Tax Rate [Line Items] |  |
U.S. statutory rates | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Tax rate difference - current provision | (9.50%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential | (9.70%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Effective tax holiday | (8.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxHolidays | (9.50%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxHolidays
Prior periods income tax adjustment per income tax return filed | 1.40%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther | 3.30%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther
Other | 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effect of tax rate change on deferred tax items | 3.50%creg_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxItems | 9.70%creg_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxItems
Valuation allowance on PRC NOL | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther
Valuation allowance on US NOL | 1.90%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 2.80%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Tax per financial statements | 23.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 30.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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