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Business Combinations (Details) - Schedule of purchase consideration paid for VIE - USD ($) | Nov. 30, 2017 | Jan. 01, 2017 | Jun. 30, 2016
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Variable Interest Entities [Member] |  |  |
Business Combinations (Details) - Schedule of purchase consideration paid for VIE [Line Items] |  |  |
Cash |  |  | $ 5,568,500
Convertible notes |  |  | 6,671,769
Derivative liability |  |  | 144,818
Net Loss |  |  | $ 12,385,087
Zhenbai [Member] |  |  |
Business Combinations (Details) - Schedule of purchase consideration paid for VIE [Line Items] |  |  |
Cash | $ 461,330 | $ 1,201,888 |
Interest Payable | 83,039 |  |
Convertible notes | 1,724,683 | 1,559,350 |
Derivative liability | 13,353 | 3,549 |
Total Payback | 2,282,406 |  |
Net Loss | $ (331,995) | $ 2,764,787 |

X
- Definition Business combination interest payable. + References No definition available. + Details
Name: | cga_BusinessCombinationInterestPayable
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed cash. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCash
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed convertible notes. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedConvertibleNotes
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed derivative liability. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeLiability
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed net loss. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetLoss
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed total. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTotal
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cga_BusinessCombinationsDetailsScheduleofpurchaseconsiderationpaidforVIELineItems
Namespace Prefix: | cga_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cga_VariableInterestEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=cga_ZhenbaiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |