Prepayments and other current assets - Allowance for credit loss related to prepayments and other current assets (Details) - CNY (¥) ¥ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Prepayments and other current assets | |||
| Beginning of the year | ¥ 7,438 | ¥ 10,089 | ¥ 110 |
| Provision of allowance for credit loss | 4,722 | 9,979 | |
| Reversal of allowance for credit loss | (3,217) | (2,651) | |
| End of the year | 8,943 | 7,438 | 10,089 |
| Write-off of the allowance for credit loss related to advances to supplier and other receivables | ¥ 0 | ¥ 0 | ¥ 0 |