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Trade and Other Payables - Summary of Other Non-current Payables (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2017
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CNY (¥)
Trade and other non-current payables [Abstract]      
Provision for bonus ¥ 148,287 $ 23,428 ¥ 133,928
Deferred income 8,060 1,274 2,844
Other payables (non-current) (Note 33, Note 36) ¥ 156,347 $ 24,702 ¥ 136,772