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Financial Risk Management Objectives and Policies - Equity Price Risk Sensitivity Analysis Assuming 10% Increase/(Decrease) in Underlying Prices (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
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Equity price risk [member] |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Statement of profit or loss | ¥ 61 | $ 10 | ¥ 626

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