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Dividends Declared and Paid - Summary of Dividends Declared and Paid (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥)
Disclosure of dividends declared and paid on ordinary capital [line items] |  |  |  |
Dividends on ordinary shares | ¥ 448,712 |  | ¥ 245,871 | ¥ 238,758
Dividend paid in cash | 448,712 | $ 70,974 | 245,871 |
Final dividend [member] |  |  |  |
Disclosure of dividends declared and paid on ordinary capital [line items] |  |  |  |
Dividends on ordinary shares | ¥ 448,712 | $ 70,974 | ¥ 245,871 |

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- Definition The amount of dividends paid by the entity on ordinary shares. [Refer: Ordinary shares [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 34 -IssueDate 2021-01-01 -Paragraph 16A -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=34&code=ifrs-tx-2021-en-r&anchor=para_16A_f&doctype=Standard -URIDate 2021-03-24 + Details
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