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Investments in Subsidiaries - Assets and Liabilities and Cash Flow Effect of Disposal of Subsidiaries (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |
Property, Property, plant and equipment |  | ¥ 3,418,243 |  | ¥ 3,553,601 |  | $ 476,490 |  |
Right-of-use assets |  | 302,013 |  | 298,445 | ¥ 342,141 | 42,099 | $ 41,601 | $ 47,693
Cash and cash equivalents |  | 5,517,049 |  | 4,963,232 |  | 769,055 |  |
Total assets |  | 27,048,094 |  | 25,757,618 | 24,137,556 | 3,770,401 |  |
Trade and other payables |  | (10,535,523) |  | (9,475,529) |  | (1,468,611) |  |
Contract liabilities |  | (630,683) |  | (691,427) |  | $ (87,915) |  |
Gain on disposal: |  |  |  |  |  |  |  |
Net cash outflow on disposal of a subsidiary |  | ¥ 217,577 | $ 30,329 | (32,056) | ¥ 0 |  |  |
Suzhou reman [member] |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |
Property, Property, plant and equipment |  |  |  | 41,111 |  |  |  |
Right-of-use assets |  |  |  | 22,782 |  |  |  |
Trade and other receivables |  |  |  | 47,595 |  |  |  |
Cash and cash equivalents |  |  |  | 32,056 |  |  |  |
Total assets |  |  |  | 143,544 |  |  |  |
Trade and other payables |  |  |  | (20,109) |  |  |  |
Provision for warranty |  |  |  | (2,145) |  |  |  |
Contract liabilities |  |  |  | (104) |  |  |  |
Carrying value of net assets |  |  |  | 121,186 |  |  |  |
Gain on disposal: |  |  |  |  |  |  |  |
Total estimated consideration less cost of disposal | [1] |  |  | 234,228 |  |  |  |
Net assets derecognized |  |  |  | (121,186) |  |  |  |
Gain on disposal of the subsidiary (Note 7.2(a)) |  |  |  | 113,042 |  |  |  |
Total Estimated Consideration Less Cost Of Disposal | [1] |  |  | 234,228 |  |  |  |
Add: Transaction cost unpaid |  |  |  | 7,506 |  |  |  |
Less: Sales proceed received but restricted in use |  |  |  | (5,000) |  |  |  |
Less: Cash and cash equivalents of a subsidiary |  |  |  | (32,056) |  |  |  |
Less: Total estimated consideration due from acquirer |  |  |  | (236,734) |  |  |  |
Net cash outflow on disposal of a subsidiary |  |  |  | ¥ (32,056) |  |  |  |
[1] | The estimated consideration is RMB 179.9 million, along with the estimated book value of cash and cash equivalents and agreed-upon fair value for the equipment in Suzhou Reman as of December 31, 2023. During 2024, net cash inflow of RMB 230.9 million (US$32.2 million) from the disposal of Suzhou Reman was received, of which RMB 13.4 million (US$1.9 million) were retention sums which were classified as restricted cash. Total of RMB 235.9 million (US$32.9 million) was received as of December 31, 2024, of which RMB 18.4 million (US$2.6 million) were retention sums which were classified as restricted cash (Note 15).

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