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Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Deferred tax assets      
Provision for doubtful debts ¥ 27,327 $ 4,288 ¥ 23,418
Accrued expense 12,923 2,028 10,841
Net operating loss carry forward 218,042 34,216 164,559
Government grant related to assets 1,411 221 684
Property and equipment depreciation 0 0 144
Estimated liabilities     7
Valuation allowance (248,118) (38,935) (188,119)
Total deferred tax assets, net 11,585 1,818 11,534
Deferred tax liabilities      
Property and equipment depreciation (867) (136) 0
Net unrealized gain on equity investments held (3,564) (559) (3,564)
Unrealized loan interest income (7,154) (1,123) (7,970)
Total deferred tax liabilities (11,585) (1,818) (11,534)
Net deferred tax assets 0 0 0
Net deferred tax liabilities ¥ 0 $ 0 ¥ 0