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Organization and Reorganization (Details 4)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2018
CNY (¥)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
CNY (¥)
Dec. 31, 2016
CNY (¥)
Variable Interest Entity [Line Items]        
Net cash generated from/(used in) operating activities ¥ (53,338) $ (7,756) ¥ (59,662) ¥ (54,092)
Net cash used in investing activities (20,746) (3,017) (4,272) 14,969
Net cash (used in)/ generated from financing activities 562,126 $ 81,758 117,954 52,477
Major VIEs        
Variable Interest Entity [Line Items]        
Net cash generated from/(used in) operating activities 24,144   (10,540) 12,930
Net cash used in investing activities (50)   0 14,965
Net cash (used in)/ generated from financing activities (31,138)   18,148 (12,283)
Net increase/(decrease) in cash and cash equivalent ¥ (7,044)   ¥ 7,608 ¥ 15,612