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Taxation - Schedule of Components of Loss Before Tax (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]        
(Loss)/income from PRC entities ¥ 610,813   ¥ (311,483) ¥ (483,970)
Loss from overseas entities (1,622,360)   (630,412) (18,085)
Loss before income tax expense ¥ (1,011,547) $ (158,733) ¥ (941,895) ¥ (502,055)