The amount of assessable profits subject to a lowered tax rate.

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Effective income tax rate reconciliation remaining profits.

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Effective income tax rate reconciliation withholding tax.

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The percentage of lowered effective income tax rate on the assessable profits.

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Minimum threshold amount of underpayment of taxes determining statute of limitation

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Represents the period of statute of limitation.

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Value of entity shares held by subsidiary, which are purchased for the purpose of granting the shares to senior employees as part of an employee stock option plan approved by the Entity's Board of Directors. Presented as a reduction of shareholders' equity at their cost to the subsidiary.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of accumulated undistributed earnings (deficit).

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Amount of unrecognized tax benefits.

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Taxation (Details) ¥ in Thousands, $ in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2025 HKD ($)	Jun. 30, 2025 CNY (¥)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 CNY (¥)	Jun. 30, 2024 CNY (¥)	Dec. 31, 2023 CNY (¥)	Dec. 31, 2020 CNY (¥)
Taxation [Line Items]
Retained earnings		¥ (4,656,714)	$ (650,052)	¥ (4,618,595)
Consideration of subsidiary							¥ 141,500
Deferred income tax		392,908		383,153	¥ 393,786	¥ 390,721
Unrecognized tax benefits		20,616		¥ 21,176	¥ 25,407	28,654
Tax Examinations Computational Errors [Member]
Taxation [Line Items]
Statute of limitations	3 years
Tax Examinations Underpayment of Taxes Exceeding Threshold Amount [Member]
Taxation [Line Items]
Statute of limitations	5 years
Underpayment of taxes		100
Tax Examinations Transfer Pricing Issues [Member]
Taxation [Line Items]
Statute of limitations	10 years
Tax Examinations Tax Evasion [Member]
Taxation [Line Items]
Statute of limitations
HONG KONG [Member]
Taxation [Line Items]
Statutory tax rate remaining profits	16.50%
Amount of assessable profits under lowered tax rate (in Dollars) \| $	$ 2,000
Statutory tax rate	8.25%
Statutory tax rate remaining profits	16.50%
China [Member]
Taxation [Line Items]
Statutory tax rate remaining profits	25.00%
Statutory tax rate	25.00%
Percentage of income tax rate	25.00%
Withholding tax	10.00%
Retained earnings
PRC [Member]
Taxation [Line Items]
Statutory tax rate remaining profits	25.00%
PRC [Member]
Taxation [Line Items]
Net operating losses carry forwards		518,941
Expire December 31 2025 [Member]
Taxation [Line Items]
Net operating losses carry forwards		9,864
Expire December 31, 2024 [Member]
Taxation [Line Items]
Net operating losses carry forwards		215,891
Expire December 31, 2027 [Member]
Taxation [Line Items]
Net operating losses carry forwards		112,151
Expire December 31, 2028 [Member]
Taxation [Line Items]
Net operating losses carry forwards		97,394
Expire December 31, 2029 [Member]
Taxation [Line Items]
Net operating losses carry forwards		¥ 83,642