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v3.26.1

TAXATION - Reconciliation (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 CNY (¥) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 | Dec. 31, 2023
Amount |  |  |  |
PRC statutory EIT rate | ¥ (99,071) | $ (14,167) |  |
Change in future tax rate (upon expiration of preferential rate) | (6,458) | (923) |  |
Change of prior year deferred tax assets | 66,281 | 9,478 |  |
Change of valuation allowance | 45,994 | 6,577 |  |
Income not subject to tax and non-deductible expenses, net | 1,166 | 167 |  |
Effect of expired net operating loss | (7,802) | (1,116) |  |
Income tax expense | ¥ 110 | $ 16 |  |
Tax Jurisdiction of Domicile [Extensible Enumeration] | Greater China | Greater China |  |
Percent |  |  |  |
PRC statutory EIT rate | 24.00% | 24.00% | 25.00% | 25.00%
Effect of different tax rates in other jurisdictions |  |  | (270.00%) | 0.00%
Change in future tax rate (upon expiration of preferential rate) | 2.00% | 2.00% | 0.00% | (1.00%)
Change of prior year deferred tax assets | (16.00%) | (16.00%) | 16.00% | (37.00%)
Change of valuation allowance | (11.00%) | (11.00%) | 174.00% | 194.00%
Income not subject to tax and non-deductible expenses, net | (1.00%) | (1.00%) | (2.00%) | 16.00%
Effect of expired net operating loss | 2.00% | 2.00% | 57.00% | (197.00%)
PRC withholding tax |  |  | 0.00% | 0.00%
Effective EIT rate | 0.00% | 0.00% | 0.00% | 0.00%

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