v3.26.3
Cash and cash equivalents (Details)
¥ in Thousands, $ in Thousands
Jun. 30, 2026
CNY (¥)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
CNY (¥)
Cash and cash equivalents (Details) [Line Items]      
Cash and cash equivalents ¥ 77,233 $ 11,383 ¥ 81,154
Restricted usage cash 1,700   1,100
CHINA [Member]      
Cash and cash equivalents (Details) [Line Items]      
Cash and cash equivalents ¥ 76,400   ¥ 81,700