Appropriations to statutory reserve. In accordance with the PRC laws, the company's subsidiary, VIEs and VIEs' subsidiary incorporated in PRC are required to make appropriations to certain non-distributable reserve from their after-tax profit (as determined under the Accounting Standards for Business Enterprises as promulgated by the Ministry of Finance of the People's Republic of China ("PRC GAAP")).

No definition available.

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- Definition

Schedule of statutory reserves [Line Items]

+ References

No definition available.

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- Definition

Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586

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Principal Accounting Policies - Statutory reserves, Dividends (Details) $ / shares in Units, ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($) $ / shares
Statutory Reserves
Appropriations to statutory reserves \| ¥	¥ 1.1	¥ 6.5	¥ 3.4
Dividends
Dividends declared			¥ 653.9	$ 100
Dividends payable, per share				$ 0.1714
ADS
Dividends
Dividends payable, per share				$ 8.2272