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Provision for Product Warranty - Summary of Provision for Product Warranty (Detail) - Product Warranty Provision [Member] ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 CNY (¥)
Disclosure of other provisions [Line Items] |  |  |
Beginning balance | ¥ 238,850 | $ 37,737 | ¥ 233,577
Provision made | 412,514 | 65,174 | 350,803
Provision utilized | (361,058) | (57,045) | (345,530)
Ending balance | ¥ 290,306 | $ 45,866 | ¥ 238,850

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- Definition The amount recognised for new other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2016-01-13 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2016-03-30&anchor=para_84_b&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of provisions other than provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2016-01-13 -Paragraph 84 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2016-03-30&anchor=para_84_a&doctype=Standard -URIDate 2016-03-31 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_78_d&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount used (ie incurrent and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2016-01-13 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2016-03-30&anchor=para_84_c&doctype=Standard -URIDate 2016-03-31 + Details
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- Details
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