Prepaid Land Use Rights, net (Narrative) (Details) - 12 months ended Dec. 31, 2017 ¥ in Millions	USD ($) yr	CNY (¥) yr
Prepaid Land Use Rights, Net 1	153,832	153,832
Prepaid Land Use Rights, Net 2 | yr	50	50
Prepaid Land Use Rights, Net 3	$ 8,157,086
Prepaid Land Use Rights, Net 4 | ¥		¥ 53.1
Prepaid Land Use Rights, Net 5	477,907
Prepaid Land Use Rights, Net 6 | ¥		¥ 3.1
Prepaid Land Use Rights, Net 7	171,999
Prepaid Land Use Rights, Net 8	41,110
Prepaid Land Use Rights, Net 9	$ 166,233