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Fair value measurement - Additional Information (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Fair value measurement        
Impairment of long-term investments ¥ 0 $ 0 ¥ 4,000 [1] ¥ 0 [1]
Impairment on acquired intangible assets and fixed assets 5,008   29,938 ¥ 0
Nonrecurring        
Fair value measurement        
Financial assets, measured at fair value 0   0  
Financial liabilities, measured at fair value ¥ 0   ¥ 0  
[1] The Company acquired various companies on December 13, 2023, which was accounted for as an under common control transaction in accordance with ASC 805-50. The Company retrospectively adjusted the above comparative consolidated balance sheets in prior year. Refer