CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
CONSOLIDATED STATEMENTS OF CASH FLOWS
Cash and cash equivalents	$ 836,975
Restricted cash	9,163
Total cash, cash equivalents, and restricted cash	846,138			¥ 2,744,006
Supplemental disclosure for cash flow information
Cash paid for interest	3,328	¥ 21,718		6,516
Cash paid for income taxes				42
Supplemental disclosure of non-cash investing and financing activities:
Accretion of convertible redeemable preferred shares	57,571	375,649	¥ 795,015	511,646
Payables related to property and equipment and intangible assets	$ (202)	(1,321)	¥ (8,852)
Issuance cost		¥ 38,821		¥ 9,689

Amount of increase (decrease) in accounts payable due to acquisition property and equipment and intangible assets.

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Noncash or part noncash accretion of convertible redeemable preferred shares.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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