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Taxation - Reconciliation of differences between statutory and effective income tax rates (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of the differences between the statutory income tax rate and the Group's effective income tax rate
Statutory income tax rate	25.00%	25.00%	25.00%
Permanent differences	(6.30%)	(7.10%)	(5.00%)
Effect due to different tax rates applicable to overseas entities	1.00%	0.20%	0.20%
Effect of lower tax rate applicable to HNTEs and EIT exemptions	(10.20%)	(9.50%)	(10.10%)
Change in valuation allowance and others	1.50%	0.60%	1.80%
Effect of withholding income tax	4.30%	4.60%	8.80%
Effective income tax rate	15.30%	13.80%	20.70%

X

- Definition

Represents the portion of the difference between the effective income tax rate and foreign statutory income tax rate attributable to changes in the valuation allowance for deferred tax assets and others.

+ References

No definition available.

+ Details

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X

- Definition

Represents the portion of the difference between the effective income tax rate and foreign statutory income tax rate attributable to nondeductible expenses and nontaxable income under enacted tax laws or differences in the methodologies used to determine income and/or expense amounts for financial statements prepared in accordance with generally accepted accounting principles.

+ References

No definition available.

+ Details

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X

- Definition

Represents the portion of the difference between the effective income tax rate and foreign statutory income tax rate on income attributable to withholding income tax accrued for cash expected to be repatriated from onshore to offshore.

+ References

No definition available.

+ Details

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X

- Definition

The portion of the effective income tax rate attributable to the difference, between income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the unified statutory income tax rates to pretax income from continuing operations of the entity's subsidiaries and VIEs, which are qualified as high and new technology, and advanced technology enterprises, and exemptions.

+ References

No definition available.

+ Details

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X

- Definition

Represents the statutory corporate income tax rate in the foreign jurisdiction.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

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- References

No definition available.

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- Definition

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12A
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

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