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Debt - Short-term borrowing (Details) $ in Thousands | Jun. 30, 2024 USD ($) | Mar. 31, 2024 CNY (¥) | Dec. 31, 2023 CNY (¥) | Sep. 30, 2023 CNY (¥) | Jun. 30, 2023 USD ($)
--- | --- | --- | --- | --- | ---
Short-term Debt [Line Items] |  |  |  |  |
Short-term debt | $ 11,635 |  |  |  | $ 11,434
Bank Of Communications Limited | Line Of Credit Maturing March 15 2025 | Line of Credit |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Maximum borrowing capacity | 19,300 | ¥ 140,000,000 |  |  |
Amount outstanding | 0 |  |  |  |
Industrial And Commercial Bank of China | Foreign Line of Credit |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Maximum borrowing capacity | 9,900 |  | ¥ 72,000,000 |  |
Amount outstanding | 0 |  |  |  |
China Construction Bank | Line Of Credit Maturing Septmeber 2025 | Line of Credit |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Maximum borrowing capacity | 6,900 |  |  | ¥ 50,000,000 |
Amount outstanding | $ 0 |  |  |  |

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