Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Text Block Supplement [Abstract]

Schedule of prepaid expenses and other current assets

	As of December 31,
	2019		2020		2020
	RMB		RMB		USD
VAT recoverable		3,182		6,754		1,036
Prepaid expense		5,021		6,919		1,060
Other receivables		3,354		80		12
Subtotal:		11,557		13,753		2,108
Less: allowance for doubtful accounts		-		-		-
Prepaid expenses and other current assets, net		11,557		13,753		2,108

Schedule of allowance for doubtful accounts

	For the years ended December 31,
	2018		2019			2020		2020
	RMB		RMB			RMB		USD
Balance, beginning of year		-		-			-		-
Additions		-		20			-		-
Write off		-		(20	)		-		-
Balance, end of year		-		-			-		-