Property and Equipment, Net - Summary of Property and Equipment (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 CNY (¥)
At cost:
Property and equipment, gross	¥ 307,646	$ 44,311	¥ 227,725
Less: Accumulated depreciation	(173,072)	(24,928)	(124,171)
Property and equipment, net	134,574	19,383	103,554
Electronic Equipment [Member]
At cost:
Property and equipment, gross	234,360	33,756	177,862
Office Equipment [Member]
At cost:
Property and equipment, gross	1,024	147	851
Motor Vehicles [Member]
At cost:
Property and equipment, gross	3,418	492	2,511
Purchased and Internally-Developed Software [Member]
At cost:
Property and equipment, gross	26,480	3,814	16,629
Leasehold Improvements [Member]
At cost:
Property and equipment, gross	¥ 42,364	$ 6,102	¥ 29,872

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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+ References

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