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Other Receivables (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Other Receivables (Textual)
Advance to third party	$ 8,166	$ 7,652
Maintenance cost and tax receivable	$ 4,150,000	$ 3,060,000

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