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8. DUE TO A RELATED PARTY AND RELATED PARTY TRANSACTIONS (Details Narrative) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Related Party Transactions [Abstract]
General and administrative expense	$ 100,704	$ 100,704
Proceeds from long term borrowing	$ 450,000	$ 655,369
Equity interest of Mr. Ming Yang	100.00%	100.00%

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- Definition

Custom Element.

+ References

No definition available.

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Namespace Prefix:	gure_
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Balance Type:	na
Period Type:	duration

X

- Definition

Amount of general and administrative expense classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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