Prepaid Expenses and Other Current Assets (Details) - Schedule of prepaid expenses and other current assets ¥ in Thousands, $ in Thousands	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)
Schedule of prepaid expenses and other current assets [Abstract]
VAT recoverable	¥ 6,754	$ 1,036	¥ 3,182
Prepaid expense	6,919	1,060	5,021
Other receivables	80	12	3,354
Subtotal:	13,753	2,108	11,557
Less: allowance for doubtful accounts
Prepaid expenses and other current assets, net	¥ 13,753	$ 2,108	¥ 11,557

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Amount of allowance for credit loss on accounts receivable, classified as current.

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Amount due from parties in nontrade transactions, classified as other.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Carrying amount as of the balance sheet date of expenditures made in advance of when the economic benefit of the cost will be realized, and which will be expensed in future periods with the passage of time or when a triggering event occurs.

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Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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