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Investment in Joint Ventures - Share of Results of Joint Ventures and Carrying Amount of Investment to Joint Ventures (Parenthetical) (Detail) - CNY (¥) ¥ in Thousands | 1 Months Ended | 12 Months Ended
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Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2019
Disclosure of joint ventures [line items] |  |  |
Additional investment in joint ventures |  |  | ¥ 41,160
Eberspaecher Yuchai [member] |  |  |
Disclosure of joint ventures [line items] |  |  |
Additional investment in joint ventures | ¥ 23,500 | ¥ 17,600 |

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- Definition The cash outflow for the purchase of interests in investments accounted for using the equity method. [Refer: Investments accounted for using equity method] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_16&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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