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Accounts and notes receivable, net - Schedule of Movement in Allowance for Doubtful Accounts (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Receivables [Abstract]      
Beginning balance ¥ 43,820 $ 6,876 ¥ 28,516
Provisions (246) (39) 18,732
Write-offs (5,884) (923) (3,428)
Ending balance ¥ 37,690 $ 5,914 ¥ 43,820