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Asset Classified as Held for Sale - Summary of Value of Asset and Related Reserves of Disposal (Detail) - 12 months ended Dec. 31, 2017 ¥ in Thousands, $ in Thousands | CNY (¥) | USD ($)
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Disclosure of assets and liabilities classified as held for sale [Abstract] |  |
Interest in joint venture, representing asset classified as held for sale | ¥ 89,381 | $ 14,122
Gain on disposal: |  |
Total consideration less cost of disposal | 182,679 | 28,862
Interest in joint venture derecognized | (89,381) | (14,122)
Realization of foreign currency translation reserves upon disposal | 22,720 | 3,590
Waiver of amount due by joint venture | (8,042) | (1,271)
Gain on disposal of joint venture (Note 8.2(a)) | 107,976 | 17,059
Total consideration less cost of disposal, representing net cash inflow on disposal of the joint venture | ¥ 182,679 | $ 28,862

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- Definition Carrying amount of interest in joint venture representing asset classified as held for sale. + References No definition available. + Details
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- Definition Disclosure of assets and liabilities classified as held for sale + References No definition available. + Details
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- Definition Gain on disposal of joint venture [Abstract]. + References No definition available. + Details
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- Definition Gains (losses) on disposals of joint venture. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Interests in joint ventures derecognised + References No definition available. + Details
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- Definition Joint venture consideration less cost of disposal. + References No definition available. + Details
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- Definition Proceeds from disposal of joint venture, classified as investing activities. + References No definition available. + Details
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Namespace Prefix: | cyd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Realisation of foreign currency translation reserves upon disposal. + References No definition available. + Details
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Namespace Prefix: | cyd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Waiver of amount due by joint venture. + References No definition available. + Details
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Namespace Prefix: | cyd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration