Trade receivables - Summary of Trade Receivables (Details) ¥ in Thousands, $ in Thousands |
Dec. 31, 2024
CNY (¥)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
CNY (¥)
|
|---|---|---|---|
| Trade receivables | |||
| Trade receivables | ¥ 44,506 | $ 6,097 | ¥ 73,144 |
| Aggregate continuing and discontinued operations | |||
| Trade receivables | |||
| Trade receivables | 78,920 | 73,144 | |
| Included in assets classified as held for sale | |||
| Trade receivables | |||
| Trade receivables | 34,414 | ||
| Gross carrying amount [member] | Aggregate continuing and discontinued operations | |||
| Trade receivables | |||
| Trade receivables | 148,057 | 133,657 | |
| Accumulated impairment [member] | Aggregate continuing and discontinued operations | |||
| Trade receivables | |||
| Trade receivables | ¥ (69,137) | ¥ (60,513) |