Related Party Balances and Transactions - Sale of raw material or property, plant and equipment (Details) - Related party - CNY (¥) ¥ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Related Party Balances and Transactions | ||
| Sale of raw material or property, plant and equipment | ¥ 6,158 | ¥ 1,113 |
| Kunshan Siwopu Intelligent Equipment Co., Ltd. | ||
| Related Party Balances and Transactions | ||
| Sale of raw material or property, plant and equipment | 3,282 | |
| VTA Technology Inc. and its subsidiaries | ||
| Related Party Balances and Transactions | ||
| Sale of raw material or property, plant and equipment | 1,608 | |
| Blue Horizon Limited and its subsidiaries | ||
| Related Party Balances and Transactions | ||
| Sale of raw material or property, plant and equipment | ¥ 1,268 | |
| Wuhan Weineng Battery Assets Co., Ltd. and its subsidiary | ||
| Related Party Balances and Transactions | ||
| Sale of raw material or property, plant and equipment | ¥ 1,113 | |