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Income Taxes - Schedule of Loss Before Income Taxes By Jurisdiction (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]        
Non-PRC ¥ 20,929 $ 3,284 ¥ (178,916) ¥ (114,137)
PRC (6,440,615) (1,010,673) (2,997,998) (1,759,246)
Total ¥ (6,419,686) $ (1,007,389) ¥ (3,176,914) ¥ (1,873,383)