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Others, Net - Additional Information (Detail) ¥ in Thousands	9 Months Ended
	Sep. 30, 2020 CNY (¥)
Others Net [Line Items]
Value added tax exemption	¥ 29,469
Covid Nineteen Pandemic [Member] | Other Income [Member]
Others Net [Line Items]
Value added tax exemption	¥ 29,469

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Value added tax exemption

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