CONSOLIDATED STATEMENTS OF CASH FLOWS - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Operating activities:      
Net income ¥ 184,807 ¥ 241,854 ¥ 178,760
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation 100,724 72,757 54,981
Bad debt expense 31,499 33,605 63,103
Loss on disposal of property and equipment 917 297 500
Deferred income tax benefit (18,473) (18,895) (21,614)
Share based compensation expense 77,415 67,824 32,919
Investment income (19,267) 29
Foreign currency exchange losses (gains), net 6,471 (3,760) 29,499
Changes in operating assets and liabilities, net of effects from acquisition of Hanru Hangzhou      
Accounts receivable (164,231) 22,928 (66,901)
Prepaid expenses and other current assets (18,712) (60,362) (16,713)
Accrued interest income on time deposits 1,809 5,264 (655)
Other non-current assets (12,432) (7,071) (3,757)
Accounts payable (196) (248) 533
Amounts due from /(to) a related party (310) (800) 879
Income taxes payable 34,731 34,947 23,287
Deferred revenue 36,102 101,439 46,570
Accrued expenses and other current liabilities 50,407 36,781 27,362
Other non-current liabilities (2,604) (2,559) (1,055)
Net cash provided by operating activities 288,657 524,030 347,698
Investing activities:      
Purchase of property and equipment (177,251) (381,982) (99,961)
Proceeds from disposal of property and equipment 462 358 1,040
Purchase of short-term investments (1,970,000) (1,937,000) (945,000)
Proceeds from maturity of short-term investments 1,989,314 1,937,000 945,000
Purchase of long-term investments (50,500) (12,755) (24,000)
Payment of long-term investment deposit (4,380)
Payment for acquisition of Hanru Hangzhou (4,360) (1,000)
Cash acquired from acquisition of Hanru Hangzhou 148
Purchase of time deposits (509,739) (421,170) (639,019)
Proceeds from maturity of time deposits 528,999 678,741 690,250
Issuance of loans to employees (35,379) (18,525) (1,227)
Proceeds from repayment of loans from employees 5,352 3,096 1,608
Net cash used in investing activities (223,122) (156,449) (72,309)
Financing activities:      
Amounts received on behalf of a related party 1,432
Repayment of amounts received on behalf of a related party (1,432)
Issuance of Class A ordinary shares in connection with exercise of share options 22,254 20,388 22,456
Payment of dividend (63,087) (54,026)
Repurchase of treasury shares (143,389) (44,406) (49,355)
Net cash used in financing activities (184,222) (78,044) (26,899)
Changes in cash and cash equivalents (118,687) 289,537 248,490
Effect of foreign currency exchange rate changes on cash, cash equivalents and restricted cash (5,294) 7,197 4,413
Net change in cash, cash equivalents and restricted cash (123,981) 296,734 252,903
Cash, cash equivalents and restricted cash at beginning of year 810,672 513,938 261,035
Cash, cash equivalents and restricted cash at end of year 686,691 810,672 513,938
Supplemental disclosure of cash flow information:      
Income taxes paid 9,512 3,096 2,246
Non-cash investing and financing activities:      
Accrual for purchase of equipment 10,737 3,692 3,685
Payable for repurchase of treasury shares ¥ 17,953