REVENUE (Tables)

12 Months Ended

Dec. 31, 2020

Revenue [abstract]

Schedule of Revenue from Contracts with Customers

Revenue represents the following:

	Year Ended December 31,
	2018		2019		2020		2020
	CNY		CNY		CNY		US$
Revenue from contracts with a customer		—		12,969		6,867		1,052

Schedule of Disaggregated Revenue Information

Disaggregated revenue information

	Year Ended December 31,
	2018		2019		2020		2020
	CNY		CNY		CNY		US$
Type of goods
Sale of copper ores		—		12,969		6,867		1,052
Geographic market
Mainland China		—		12,969		6,867		1,052
Timing of revenue recognition
Goods transferred at a point in time		—		12,969		6,867		1,052