REVENUE FROM CONTRACT WITH CUSTOMERS (Tables)

6 Months Ended

Jun. 30, 2023

Notes and other explanatory information [abstract]

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