CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME(LOSS) (Parenthetical) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS)
Revenues	¥ 54,163	$ 8,499	¥ 31,740	¥ 12,366
Cost of revenue	25,351	3,979	258	0
Selling and marketing expenses, related party amounts	2,500	392	8,681	5,837
General and administrative expenses, related party amounts	1,145	180	0	750
Interest income, related party amounts	¥ 18	$ 3	¥ 1,516	¥ 279

Direct costs arising from transactions with related parties who are not affiliates or joint Ventures. These costs are categorized as cost of goods sold.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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