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Related party transactions (Details Narrative) - Yefang Zhang. [Member] - USD ($) | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Due to related party | $ 611,327 | $ 152,556
Loan amount | 311,150 |
Expenses paid by related party | $ 300,177 |

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- References No definition available. + Details
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Namespace Prefix: | cney_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | cney_DueToRelatedPartyAmount
Namespace Prefix: | cney_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | cney_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=cney_YefangZhangMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |