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Inventories - Additional Information (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Inventories        
Inventory write-down ¥ 35,406 $ 5,133 ¥ 49,485 ¥ 44,134