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PROPERTY AND EQUIPMENT, NET - Summary of property and equipment, net (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)
Property Plant And Equipment [Line Items]
Total costs	¥ 74,819		¥ 73,975
Less: accumulated depreciation and amortization	(55,370)		(34,891)
Property and equipment, net	19,449	$ 2,981	39,084
Leasehold improvement
Property Plant And Equipment [Line Items]
Total costs	8,093		8,093
Motor vehicles
Property Plant And Equipment [Line Items]
Total costs	1,993		1,604
Electronic equipment
Property Plant And Equipment [Line Items]
Total costs	56,453		56,068
Office equipment & furniture
Property Plant And Equipment [Line Items]
Total costs	6,873		6,868
Software
Property Plant And Equipment [Line Items]
Total costs	¥ 1,407		¥ 1,342

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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