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Investment in Joint Ventures - Summarized Financial Information of Joint Ventures and Reconciliation with Carrying Amount of Investment in Consolidated Financial Statements (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2020 CNY (¥)
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Non-current assets | ¥ 6,593,763 |  | ¥ 7,041,001 |  | $ 928,228 |  |
Cash and bank balances | 5,544,376 |  | 4,451,489 | ¥ 4,788,219 | 780,502 | $ 626,653 | ¥ 5,877,647
Others | 16,733 |  | 16,710 |  | 2,355 |  |
Total assets | 25,757,618 |  | 24,137,556 | 24,905,309 | 3,625,995 |  |
Non-current liabilities | (1,523,411) |  | (1,079,072) |  | (214,457) |  |
Total liabilities | (13,581,993) |  | (12,302,492) | (13,289,965) | (1,911,987) |  |
Investment in joint ventures | 237,229 |  | 154,703 | 151,095 | 33,396 |  |
Revenue | 18,046,349 | $ 2,540,451 | 16,030,636 | 21,265,930 |  |  |
Depreciation and amortization | (665,065) | (93,624) | (624,692) | (573,596) |  |  |
Interest expense | (95,587) | (13,456) | (90,909) | (111,792) |  |  |
Profit/(loss) for the year, representing total comprehensive income for the year | 454,874 | 64,034 | 424,778 | 435,099 |  |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | 62,083 | $ 8,740 | (27,546) | ¥ (95,985) |  |  |
Y & C Engine Co., Ltd. [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Non-current assets | 685,434 |  | 616,161 |  |  |  |
Cash and bank balances | 64,252 |  | 97,741 |  |  |  |
Others | 426,105 |  | 502,174 |  |  |  |
Total assets | 1,175,791 |  | 1,216,076 |  |  |  |
Non-current liabilities | (146,218) |  | (145,418) |  |  |  |
Current liabilities | (946,348) |  | (987,638) |  |  |  |
Total liabilities | ¥ (1,092,566) |  | ¥ (1,133,056) |  |  |  |
Proportion of the Group's ownership | 45.00% | 45.00% | 45.00% | 45.00% |  |  |
Group's share of net assets | ¥ 37,451 |  | ¥ 37,359 |  |  |  |
Unrealized profit on transactions with joint venture | (24,474) |  | (36,871) |  |  |  |
Investment in joint ventures | 12,977 |  | 488 |  | 1,827 |  |
Revenue | 1,562,179 |  | 1,255,967 | ¥ 2,072,721 |  |  |
Depreciation and amortization | (63,648) |  | (29,617) | (52,881) |  |  |
Interest expense | (22,508) |  | (30,547) | (51,836) |  |  |
Profit/(loss) for the year, representing total comprehensive income for the year | ¥ (6) |  | ¥ (65,961) | ¥ (282,205) |  |  |
Proportion of the Group's ownership | 45.00% | 45.00% | 45.00% | 45.00% |  |  |
Group's share of results | ¥ (3) |  | ¥ (29,682) | ¥ (126,992) |  |  |
Unrealized profit on transactions with joint venture | (4,016) |  | (24,434) | 1,139 |  |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | (4,019) | $ (566) | (54,116) | (125,853) |  |  |
Net assets/(liabilities) | 83,225 |  | 83,020 |  |  |  |
Y & C Engine Co., Ltd. [member] | Significant Joint Ventures [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Investment in joint ventures | 12,977 |  | 488 |  |  |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | (4,019) |  | (54,116) | (125,853) |  |  |
Joint ventures [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Non-current assets | 812,105 |  | 765,953 |  | 114,323 |  |
Cash and bank balances | 604,281 |  | 416,292 |  | 85,067 |  |
Others | 697,995 |  | 743,382 |  | 98,259 |  |
Total assets | 2,114,381 |  | 1,925,627 |  | 297,649 |  |
Non-current liabilities | (151,043) |  | (145,418) |  | (21,263) |  |
Current liabilities | (1,441,416) |  | (1,399,323) |  | (202,913) |  |
Total liabilities | (1,592,459) |  | (1,544,741) |  | (224,176) |  |
Investment in joint ventures | 237,229 |  | 154,703 |  | 33,396 |  |
Revenue | 2,349,730 | 330,780 | 1,919,544 | 2,697,837 |  |  |
Depreciation and amortization | (79,887) | (11,246) | (47,076) | (55,967) |  |  |
Interest expense | (15,710) | (2,212) | (30,546) | (53,727) |  |  |
Profit/(loss) for the year, representing total comprehensive income for the year | 140,823 | 19,824 | (22,901) | (224,868) |  |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | 62,083 | 8,740 | (27,546) | (95,985) |  |  |
Net assets/(liabilities) | 521,922 |  | 380,886 |  | 73,473 |  |
Joint ventures [member] | Significant Joint Ventures [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Investment in joint ventures | 232,002 |  | 149,005 |  | 32,660 |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | 66,200 | 9,319 | (25,115) | (96,439) |  |  |
Joint ventures [member] | Other Joint Ventures [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Investment in joint ventures | 5,227 |  | 5,698 |  | 736 |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | (4,117) | $ (579) | (2,431) | ¥ 454 |  |  |
MTU Yuchai Power Co., Ltd [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Non-current assets | 74,794 |  | 89,353 |  |  |  |
Cash and bank balances | 523,858 |  | 291,807 |  |  |  |
Others | 226,881 |  | 209,696 |  |  |  |
Total assets | 825,533 |  | 590,856 |  |  |  |
Non-current liabilities | (4,825) |  |  |  |  |  |
Current liabilities | (414,396) |  | (334,576) |  |  |  |
Total liabilities | ¥ (419,221) |  | ¥ (334,576) |  |  |  |
Proportion of the Group's ownership | 50.00% | 50.00% | 50.00% | 50.00% |  |  |
Group's share of net assets | ¥ 203,156 |  | ¥ 128,140 |  |  |  |
Unrealized profit on transactions with joint venture | 0 |  |  |  |  |  |
Investment in joint ventures | 203,156 |  | 128,140 |  | $ 28,599 |  |
Revenue | 708,432 |  | 594,197 | ¥ 467,800 |  |  |
Depreciation and amortization | (8,682) |  | (9,733) | (2,377) |  |  |
Interest expense | 6,762 |  | 470 | (1,850) |  |  |
Profit/(loss) for the year, representing total comprehensive income for the year | ¥ 150,030 |  | ¥ 66,076 | ¥ 54,526 |  |  |
Proportion of the Group's ownership | 50.00% | 50.00% | 50.00% | 50.00% |  |  |
Group's share of results | ¥ 75,015 |  | ¥ 33,038 | ¥ 27,263 |  |  |
Unrealized profit on transactions with joint venture | (288) |  | 7,241 | 774 |  |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | 74,727 | $ 10,520 | 40,279 | 28,037 |  |  |
Net assets/(liabilities) | 406,312 |  | 256,280 |  |  |  |
MTU Yuchai Power Co., Ltd [member] | Significant Joint Ventures [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Investment in joint ventures | 203,156 |  | 128,140 |  |  |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | 74,727 |  | 40,279 | ¥ 28,037 |  |  |
Purem [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Non-current assets | 51,877 |  | 60,439 |  |  |  |
Cash and bank balances | 16,171 |  | 26,744 |  |  |  |
Others | 45,009 |  | 31,512 |  |  |  |
Total assets | 113,057 |  | 118,695 |  |  |  |
Non-current liabilities | 0 |  |  |  |  |  |
Current liabilities | (80,672) |  | (77,109) |  |  |  |
Total liabilities | ¥ (80,672) |  | ¥ (77,109) |  |  |  |
Proportion of the Group's ownership | 49.00% | 49.00% | 49.00% | 49.00% |  |  |
Group's share of net assets | ¥ 15,869 |  | ¥ 20,377 |  |  |  |
Unrealized profit on transactions with joint venture | 0 |  |  |  |  |  |
Revenue | 79,119 |  | 69,380 | ¥ 157,316 |  |  |
Depreciation and amortization | (7,557) |  | (7,726) | (709) |  |  |
Interest expense | 36 |  | (469) | (41) |  |  |
Profit/(loss) for the year, representing total comprehensive income for the year | ¥ (9,201) |  | ¥ (23,016) | ¥ 2,811 |  |  |
Proportion of the Group's ownership | 49.00% | 49.00% | 49.00% | 49.00% |  |  |
Group's share of results | ¥ (4,508) |  | ¥ (11,278) | ¥ 1,377 |  |  |
Unrealized profit on transactions with joint venture | 0 |  |  |  |  |  |
Net assets/(liabilities) | 32,385 |  | 41,586 |  |  |  |
Purem [member] | Significant Joint Ventures [member] |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |
Investment in joint ventures | 15,869 |  | 20,377 |  |  |  |
Group's share of results of other joint ventures, representing the Group's share of total comprehensive income loss of other joint ventures | ¥ (4,508) |  | ¥ (11,278) | ¥ 1,377 |  |  |

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