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Income Tax - Reconciliation of the Effective Income Tax Rate (Details) - Mainland China | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Taxes [Line Items] |  |  |
Statutory income tax rate | 25.00% | 25.00% | 25.00%
Tax-exempted income | 0.19% | 0.00% | 0.00%
Share-based compensation | (2.08%) | (1.40%) | (0.92%)
Research and development super deduction | 7.11% | 2.51% | 0.00%
Non-deductible expenses | (2.83%) | (2.31%) | (5.78%)
Prior year tax filing adjustment | 1.32% | 6.33% | 1.50%
Effect of different tax rate of subsidiary operation in other jurisdictions | 0.02% | (2.85%) | (4.60%)
Preferential tax rate | (7.12%) | (6.26%) | (4.30%)
Expiration of deductible qualified donation | 2.28% | 0.00% | 0.00%
Changes in valuation allowance | (23.89%) | (21.02%) | (10.90%)
Effective income tax rate | 0.00% | 0.00% | 0.00%

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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 attributable to changes in the valuation allowance for deferred tax assets. + References Reference 1: 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 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1 + Details
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