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Significant Accounting Policies - Convenience Translation, Cash & cash equivalents, restricted cash and time deposits (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Cash and cash equivalents and time deposits
Convenience translation rate (USD to RMB)	6.8972		6.8972
Cash and cash equivalents and time deposits
Cash and cash equivalents	¥ 10,172,584,000	¥ 7,523,108,000	$ 1,474,886		¥ 4,678,109,000
Time deposits	4,767,972,000	7,632,334,000	691,291
Restricted cash	14,800,000	0
PRC Subsidiaries and Variable Interest Entities
Cash and cash equivalents and time deposits
Cash and cash equivalents	¥ 4,429,700,000	¥ 1,554,500,000
Cash and cash equivalents held by PRC subsidiaries and VIEs (as a percent)	43.00%	21.00%
Cash held in accounts managed by online payment platforms
Cash and cash equivalents and time deposits
Cash and cash equivalents	¥ 51,400,000	¥ 50,700,000
Denominated in US dollars
Cash and cash equivalents and time deposits
Cash and cash equivalents	6,036,100,000	6,375,100,000	866,700	$ 999,900
Time deposits	¥ 4,768,000,000	¥ 7,632,300,000	$ 684,600	$ 1,197,100

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Percentage of cash and cash equivalents held by subsidiaries and VIEs of total cash and cash equivalents of the Group.

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Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

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Amount of cash restricted as to withdrawal or usage. 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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