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Accounts Receivable Net - Summary of Accounts Receivable Net (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, gross ¥ 6,458   ¥ 8,361
Less: allowance for doubtful accounts     0
Accounts receivable, net ¥ 6,458 $ 1,013 ¥ 8,361