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Other Receivables and Prepayments - Summary of Other Non-current Receivables (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2017
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CNY (¥)
Disclosure of financial assets [Abstract]      
Other receivables (non-current)(Note 36) ¥ 620 $ 98 ¥ 1,588