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Land Use Rights (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
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Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Cost | $ 26,516 | ¥ 172,520 | ¥ 172,658
Accumulated amortization | (1,360) | (8,849) | (5,012)
Land use rights, net | $ 25,156 | ¥ 163,671 | ¥ 167,646

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