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Intangible Assets - Summary of Intangible Assets (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥)
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | ¥ 954,144 |  |
Amortization | 1,012 | $ 156 | ¥ 1,012
Intangible assets and goodwill ending balance | 1,483,968 | 229,315 | 954,144
Technology Know-how [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 9,110 |  |
Intangible assets and goodwill ending balance | 8,098 | 1,251 | 9,110
Development costs [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 562,587 |  |
Intangible assets and goodwill ending balance | 1,093,423 | 168,965 | 562,587
Goodwill [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 212,636 |  |
Intangible assets and goodwill ending balance | 212,636 | 32,858 | 212,636
Trademarks [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 169,811 |  |
Intangible assets and goodwill ending balance | 169,811 | $ 26,241 | 169,811
Cost [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 1,087,531 |  | 551,012
Addition | 530,836 |  | 536,519
Intangible assets and goodwill ending balance | 1,618,367 |  | 1,087,531
Cost [member] | Technology Know-how [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 136,822 |  | 136,822
Intangible assets and goodwill ending balance | 136,822 |  | 136,822
Cost [member] | Development costs [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 562,587 |  | 195,879
Addition | 530,836 |  | 366,708
Intangible assets and goodwill ending balance | 1,093,423 |  | 562,587
Cost [member] | Goodwill [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 218,311 |  | 218,311
Intangible assets and goodwill ending balance | 218,311 |  | 218,311
Cost [member] | Trademarks [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | 169,811 |  |
Addition |  |  | 169,811
Intangible assets and goodwill ending balance | 169,811 |  | 169,811
Accumulated depreciation, amortisation and impairment [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | (133,387) |  | (132,375)
Amortization | 1,012 |  | 1,012
Intangible assets and goodwill ending balance | (134,399) |  | (133,387)
Accumulated depreciation, amortisation and impairment [member] | Technology Know-how [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | (127,712) |  | (126,700)
Amortization | 1,012 |  | 1,012
Intangible assets and goodwill ending balance | (128,724) |  | (127,712)
Accumulated depreciation, amortisation and impairment [member] | Goodwill [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets and goodwill beginning balance | (5,675) |  | (5,675)
Intangible assets and goodwill ending balance | ¥ (5,675) |  | ¥ (5,675)

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- Definition The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2020-01-01 + Details
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