REVENUE FROM CONTRACT WITH CUSTOMERS (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2023

Dec. 31, 2022

Revenue From Contract With Customers

Schedule of disaggregated revenue information

	Six months ended June 30,
	2022		2023		2023
	CNY		CNY		US$
	(Unaudited)		(Unaudited)		(Unaudited)
Type of goods or services
Construction contract revenue		12,639		8,690		1,198
Operation and maintenance services		—		405		56
Operation services of service concession arrangement		3,433		3,121		430
Total revenue from contracts with customers		16,072		12,216		1,684
Geographic market
Mainland China		16,072		12,216		1,684
Timing of revenue recognition
Over time		16,072		12,216		1,684
Total revenue from contracts with customers		16,072		12,216		1,684

	Year Ended December 31, 2020
	Wastewater treatment		Exploration and mining		Total
	CNY		CNY		CNY
Segments
Type of goods or services
Sales of copper ores		—		6,867		6,867
Construction contract revenue		7,665		—		7,665
Operation and maintenance services		3,561		—		3,561
Operation services of service concession arrangement		2,295		—		2,295
Construction services of service concession arrangement		22,110		—		22,110
Total revenue from contracts with customers		35,631		6,867		42,498
Geographic market
Mainland China		35,631		6,867		42,498
Timing of revenue recognition
At a point in time		—		6,867		6,867
Over time		35,631		—		35,631
Total revenue from contracts with customers		35,631		6,867		42,498

	Year Ended December 31, 2021
	Wastewater treatment		Exploration and mining		Total
	CNY		CNY		CNY
Segments
Type of goods or services
Construction contract revenue		12,203		—		12,203
Operation and maintenance services		183		—		183
Operation services of service concession arrangement		5,953		—		5,953
Construction services of service concession arrangement		396		—		396
Total revenue from contracts with customers		18,735		—		18,735
Geographic market
Mainland China		18,735		—		18,735
Timing of revenue recognition
Over time		18,735		—		18,735
Total revenue from contracts with customers		18,735		—		18,735

	Year Ended December 31, 2022
	Wastewater treatment		Exploration and mining		Total		Total
	CNY		CNY		CNY		US$
Segments
Type of goods or services
Construction contract revenue		14,633		—		14,633		2,122
Sales of wastewater treatment equipment		161		—		161		23
Operation services of service concession arrangement		5,512		—		5,512		799
Total revenue from contracts with customers		20,306		—		20,306		2,944
Geographic market
Mainland China		20,306		—		20,306		2,944
Timing of revenue recognition
At a point in time		161		—		161		23
Over time		20,145		—		20,145		2,921
Total revenue from contracts with customers		20,306		—		20,306		2,944

(i) Disaggregated revenue information

Schedule of the amounts of transaction prices allocated to the remaining performance obligations

	December 31
	2021		2022		2022
	CNY		CNY		US$
Amounts expected to be recognized as revenue:
Within one year		17,774		16,406		2,378
After one year		183,114		172,683		25,034
		200,888		189,089		27,412