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Other Income and Expenses Recognized in Statement of Profit and Loss - Summary of Depreciation and Amortization (Parenthetical) (Detail) - 12 months ended Dec. 31, 2020 ¥ in Millions, $ in Millions | CNY (¥) | USD ($)
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COVID - 19 [Member] |  |
Disclosure of income statement [line items] |  |
Rent Rebate Income | ¥ 0.2 | $ 0.1

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