EMPLOYEE BENEFITS (Tables)

12 Months Ended

Dec. 31, 2022

Notes and other explanatory information [abstract]

Schedule of employee benefits

	Year Ended December 31,
	2020			2021			2022		2022
	CNY			CNY			CNY		US$
Wages, salaries and allowances		9,680			9,302			8,566		1,242
Housing funds (a)		331			415			215		31
Contribution to pension plans (a)		518			1,493			1,516		220
Welfare and other expenses		972			333			290		42
Less: employee benefit expenses capitalized into intangible assets-concession right		(89	)		(47	)		—		—
Total employee benefits		11,412			11,496			10,587		1,535

(a) According to the Mainland China state regulations, the employees of the Group's subsidiaries which operate in Mainland China are required to participate in a central pension scheme operated by the local municipal government and government-sponsored housing funds. These subsidiaries are required to contribute a certain percentage of their payroll costs for those qualified urban employees to the central pension scheme as well as to housing funds.