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Related Party Balances and Transactions - Amount due to related parties, non-current (Details) - Related party ¥ in Thousands, $ in Thousands | Dec. 31, 2025 CNY (¥) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 CNY (¥)
--- | --- | --- | ---
Related Party Balances and Transactions |  |  |
Amount due to related parties, non-current | ¥ 604,178 | $ 86,396 | ¥ 329,492
Wuhan Weineng Battery Assets Co., Ltd. and its subsidiaries |  |  |
Related Party Balances and Transactions |  |  |
Amount due to related parties, non-current | 351,014 |  | 78,460
Mclaren Group Holdings Ltd. and its subsidiaries |  |  |
Related Party Balances and Transactions |  |  |
Amount due to related parties, non-current | 182,074 |  | ¥ 251,032
Zhong'an Energy (Anhui) Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Amount due to related parties, non-current | ¥ 71,090 |  |

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