v3.25.4
Cash and cash equivalents (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Cash and cash equivalents (Details) [Line Items]        
Cash and cash equivalents ¥ 126,614 $ 17,346 ¥ 436,242 ¥ 513,351
Restricted usage cash 12,800   16,900  
CHINA [Member]        
Cash and cash equivalents (Details) [Line Items]        
Cash and cash equivalents ¥ 125,600   ¥ 400,100