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Related Party Balances and Transactions - Acceptance of R&D and maintenance service (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Related Party Balances and Transactions |  |  |
Acceptance of R&D and maintenance service | ¥ 136,358 | ¥ 8,194 | ¥ 3,402
Jianglai Advanced Manufacturing Technology (Anhui) Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of R&D and maintenance service | 107,144 |  |
Kunshan Siwopu Intelligent Equipment Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of R&D and maintenance service | 13,956 | 7,265 | 1,449
Wuhan Weineng Battery Assets Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of R&D and maintenance service | 8,508 |  |
Xunjie Energy (Wuhan) Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of R&D and maintenance service | 3,735 | ¥ 929 |
Ningbo Meishan Free Trade Port Weilai Xinneng Investment Management Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of R&D and maintenance service | ¥ 3,015 |  |
Suzhou Zenlead XPT New Energy Technologies Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of R&D and maintenance service |  |  | ¥ 1,953

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