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Inventories - Additional information (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Inventory Disclosure [Abstract]        
Inventory write-down ¥ 6,666 $ 913 ¥ 10,641 ¥ 35,406