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CONSOLIDATED STATEMENTS OF CASH FLOWS
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2018
CNY (¥)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
CNY (¥)
Dec. 31, 2016
CNY (¥)
Cash flows from operating activities:        
Net Loss ¥ (78,700) $ (11,445) ¥ (90,671) ¥ (86,568)
Adjustment to reconcile net loss to net cash used in operating activities:        
Depreciation of property, equipment and software 1,060 154 965 1,208
Share based compensation 78,133 11,364 1,896 2,860
Allowance for doubtful accounts 491 71 418  
Investment (income)/loss from long-term investments 660 96   (230)
Change in fair value of warrant 3,843 559 1,390 (560)
Interests expenses - net 2,083 303 1,147 1,397
(Gains)/Losses on disposal of property and equipment 1     (23)
Changes in operating assets and liabilities:        
Accounts receivable (44,279) (6,440) (4,014) 3,259
Receivables due from related parties     (1,000)  
Prepayment and other current assets (50,377) (7,327) (1,441) 3,948
Held-for-sale assets 837 122 251 (1,088)
Accounts payable 3,656 532 3,153 (782)
Advance from customers 4,953 720 7,116 (2,277)
Salary and welfare benefits payable 7,538 1,096 5,031 20,630
Other taxes payable (4,502) (655) 13,281 6,740
Other current liabilities 21,265 3,094 3,562 (3,352)
Held-for-sale liabilities     (746) 746
Net cash used in operating activities (53,338) (7,756) (59,662) (54,092)
Cash flows from investing activities:        
Purchase of property, equipment and software, and other non-current assets (20,708) (3,012) (272) (65)
Purchase of short-term investments       (48,500)
Cash paid for short-term investments     (4,000)  
Cash paid for long-term investments (4,250) (618)   (500)
Proceeds from maturities of short-term investments       63,730
Net cash received from disposal of property, equipment and software 12 2   304
Cash received from disposal of short-term investments 4,200 611    
Net cash generated from/(used in) investing activities (20,746) (3,017) (4,272) 14,969
Cash flows from financing activities:        
Cash received from convertible loans     41,165 20,000
Cash received from short-term borrowings 19,942 2,900 37,797  
Cash repayments of short-term borrowings (44,913) (6,532) (17,854)  
Cash received from long-term borrowings     9,945  
Cash repayments of long-term borrowings (2,932) (426) (1,985)  
Cash received from borrowing from a third party       32,477
Cash repayments of borrowing from a third party (19,486) (2,834) (12,991)  
Cash received from loans provided by employees 11,199 1,629 3,235  
Cash repayments of loans provided by employees (14,434) (2,099)    
Proceeds from issuance of Series C+ convertible redeemable preferred shares     59,091  
Payment of issuance cost for Series C+ convertible redeemable preferred shares     (449)  
Proceeds from issuance of Series D-1 convertible redeemable preferred shares 151,118 21,979    
Payment of issuance cost for Series D-1 convertible redeemable preferred shares (307) (45)    
Proceeds from issuance of Series D-2 convertible redeemable preferred shares 359,834 52,336    
Payment of issuance cost for Series D-2 convertible redeemable preferred share (1,267) (184)    
Proceeds of initial public offering, net of issuance costs 103,372 15,034    
Net cash generated from financing activities 562,126 81,758 117,954 52,477
Effect of exchange rate changes on cash, cash equivalents and restricted cash 12,713 1,847 (1,002) 26
Net increase in cash, cash equivalents and restricted cash 500,755 72,832 53,018 13,380
Cash, cash equivalents and restricted cash at beginning of the year 77,803 11,316 24,785 11,405
Including:        
Cash and cash equivalents at the beginning of the year 66,695 9,700 24,785 11,405
Restricted cash at the beginning of the year 11,108 1,616    
Cash, cash equivalents and restricted cash at the end of year 578,558 84,148 77,803 24,785
Including:        
Cash and cash equivalents at the end of the year 578,558 84,148 66,695 24,785
Restricted cash at the end of the year     11,108  
Supplemental disclosures of cash flow information:        
Cash paid for income taxes 0 0 0 0
Cash paid for interest expense (4,340) (631) (1,366)  
Supplemental schedule of non-cash investing and financing activities:        
Accretions to pre-IPO preferred shares redemption value 35,066 5,100 20,945 16,905
Imputed interest for borrowing from a third party 450 65 ¥ 1,147 ¥ 837
Conversion and redesignation of pre-IPO preferred shares into Class A ordinary shares ¥ 930,436 $ 135,326