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Revenue - Summary of Revenue (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2017
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CNY (¥)
Dec. 31, 2015
CNY (¥)
Revenue [Abstract]        
Sale of goods ¥ 16,085,640 $ 2,541,416 ¥ 13,542,568 ¥ 13,634,395
Sale of development property 710 112    
Revenue from hotel and restaurant operations 127,971 20,219 110,718 94,053
Rental income 8,121 1,283 11,554 4,989
Revenue ¥ 16,222,442 $ 2,563,030 ¥ 13,664,840 ¥ 13,733,437