Restricted Net Assets (Details 4)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2014
CNY (¥)
Dec. 31, 2013
CNY (¥)
Condensed Cash Flow Statements, Captions [Line Items]        
Cash flows provided by operating activities $ 7,618 ¥ 49,347 ¥ 77,198 ¥ 166,967
Cash flows (used in)/provided by investing activities (16,990) (110,059) 70,258 (111,747)
Cash flows (used in)/provided by financing activities 24,186 156,674 (183,627) (73,234)
Effect of exchange rate changes on cash and cash equivalents 723 4,681 415 (7,082)
Net (decrease)/increase in cash and cash equivalents 15,537 100,643 (35,756) (25,096)
Cash and cash equivalents at beginning of year 30,389 196,857 232,613 257,709
Cash and cash equivalents at end of year 45,926 297,500 196,857 232,613
Parent company        
Condensed Cash Flow Statements, Captions [Line Items]        
Cash flows provided by operating activities 480 3,099 491 519
Cash flows (used in)/provided by investing activities 1,461 9,466 167,853 (23,823)
Cash flows (used in)/provided by financing activities 1,030 6,674 (183,627) (73,234)
Effect of exchange rate changes on cash and cash equivalents 658 4,264 260 (6,844)
Net (decrease)/increase in cash and cash equivalents 3,629 23,503 (15,023) (103,382)
Cash and cash equivalents at beginning of year 9,006 58,342 73,365 176,747
Cash and cash equivalents at end of year $ 12,635 ¥ 81,845 ¥ 58,342 ¥ 73,365