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Statements of Cash Flows (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (790,506)us-gaap_NetIncomeLoss $ (477,818)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 14,877us-gaap_Depreciation 10,711us-gaap_Depreciation
Accretion of debt discount 7,494us-gaap_AmortizationOfDebtDiscountPremium 4,943us-gaap_AmortizationOfDebtDiscountPremium
Decrease (increase) in assets:    
Amounts due from related parties 7,924us-gaap_IncreaseDecreaseInDueToOtherRelatedParties (7,924)us-gaap_IncreaseDecreaseInDueToOtherRelatedParties
Accounts receivable 11,027us-gaap_IncreaseDecreaseInAccountsReceivable   
Other receivables (7,729)us-gaap_IncreaseDecreaseInOtherReceivables 88,030us-gaap_IncreaseDecreaseInOtherReceivables
Deposits      
Increase (decrease) in liabilities:    
Accounts payable, related parties (69,141)us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties 72,632us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties
Accounts payable (16,937)us-gaap_IncreaseDecreaseInAccountsPayable 35,210us-gaap_IncreaseDecreaseInAccountsPayable
Net cash used in operating activities (842,991)us-gaap_NetCashProvidedByUsedInOperatingActivities (274,216)us-gaap_NetCashProvidedByUsedInOperatingActivities
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchases of buildings and land    (171,415)crvn_PaymentsToPurchaseBuildingAndLand
Net cash used in investing activities    (171,415)us-gaap_NetCashProvidedByUsedInInvestingActivities
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the sale of common stock 314,898us-gaap_ProceedsFromIssuanceOfCommonStock 1,083,713us-gaap_ProceedsFromIssuanceOfCommonStock
Net cash provided by financing activities 314,898us-gaap_NetCashProvidedByUsedInFinancingActivities 1,083,713us-gaap_NetCashProvidedByUsedInFinancingActivities
Effect of exchange rate changes on cash and cash equivalents (23,824)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents (24,610)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
NET CHANGE IN CASH (551,917)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 613,472us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AT BEGINNING OF PERIOD 669,688us-gaap_CashAndCashEquivalentsAtCarryingValue 56,216us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AT END OF PERIOD 117,771us-gaap_CashAndCashEquivalentsAtCarryingValue 669,688us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL INFORMATION:    
Interest paid      
Income taxes paid      
NON-CASH INVESTING AND FINANCING ACTIVITIES:    
Note payable exchanged for purchase of building    121,685crvn_NonCashOrPartNonCashBuildingPurchasePayableDueInExchangeForBuilding
Value of shares issued for stock subscription    $ 75,324us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations