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Other Receivables (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Other Receivables (Textual)
Advance to third party	$ 7,273	$ 7,285
Tax and maintenance cost receivable	1,016,314	$ 1,528,368
Received from unrelated individuals	$ 930,000

X

- Definition

It represent the value of third party advance.

+ References

No definition available.

+ Details

Name:	creg_AdvanceToThirdParty
Namespace Prefix:	creg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

It represent the value of maintenance cost and tax receivable.

+ References

No definition available.

+ Details

Name:	creg_MaintenanceCostAndTaxReceivable
Namespace Prefix:	creg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	creg_OtherReceivablesTextualsAbstract
Namespace Prefix:	creg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Received from unrelated Individuals.

+ References

No definition available.

+ Details

Name:	creg_ReceivedFromUnrelatedIndividuals
Namespace Prefix:	creg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant