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ADDITIONAL FINANCIAL INFORMATION - FINANCIAL STATEMENTS SCHEDULE I - STATEMENTS OF CASH FLOWS (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
Operating activities: |  |  |  |
Net loss | $ (72,083) | ¥ (501,827) | ¥ (382,041) | ¥ (249,327)
Adjustments to reconcile net income to net cash used in operating activities: |  |  |  |
Other non-current liabilities | (316) | (2,199) | 8,135 |
Net cash used in operating activities | (73,599) | (512,382) | (343,018) | (204,372)
Investing activities: |  |  |  |
Purchase of long-term investments |  |  |  | (140)
Proceeds from sale or maturity of short-term investments | 123,977 | 863,106 | 578,359 | 80,198
Net cash (used in) provided by investing activities | 34,140 | 237,675 | 44,454 | (36,125)
Financing activities: |  |  |  |
Proceeds from ordinary shareholders | 1,627 | 11,328 |  | 25
Payments of share repurchase | 3,302 | 22,991 |  |
Proceeds from IPO, net of issuance cost |  |  | 694,878 |
Proceeds of preferred shareholders |  |  | 277,819 | 49,475
Net cash provided by financing activities | 15,655 | 108,987 | 972,697 | 49,500
Effect of exchange rate changes on cash and cash equivalents, and restricted cash | 1,394 | 9,702 | 11,947 | (14,848)
Net (decrease) increase in cash and cash equivalents, and restricted cash | (22,410) | (156,018) | 686,080 | (205,845)
Cash and cash equivalents, and restricted cash at the beginning of the year | 122,632 | 853,740 | 167,660 | 373,505
Cash and cash equivalents, and restricted cash at the end of the year | 100,222 | 697,722 | 853,740 | 167,660
Parent |  |  |  |
Operating activities: |  |  |  |
Net loss | (71,764) | (499,606) | (380,091) | (248,580)
Adjustments to reconcile net income to net cash used in operating activities: |  |  |  |
Share of loss of subsidiaries and VIEs | 71,654 | 498,837 | 381,601 | 247,746
Other current liabilities | 6 | 43 | 2,284 |
Other non-current liabilities | (316) | (2,199) | 8,135 |
Investment income | (713) | (4,962) | (2,591) |
Net cash used in operating activities | (1,133) | (7,887) | 9,338 | (834)
Investing activities: |  |  |  |
Purchase of long-term investments |  |  | (821,962) |
Payment for shareholder loan to subsidiaries | (29,215) | (203,388) |  |
Proceeds from sale or maturity of short-term investments | 16,837 | 117,214 | 25,160 |
Net cash (used in) provided by investing activities | (12,378) | (86,174) | (796,802) |
Financing activities: |  |  |  |
Proceeds from ordinary shareholders | 1,627 | 11,328 |  | 25
Payments of share repurchase | (3,302) | (22,991) |  |
Proceeds from IPO, net of issuance cost |  |  | 694,878 |
Proceeds of preferred shareholders |  |  | 277,819 |
Net cash provided by financing activities | (1,675) | (11,663) | 972,697 | 25
Effect of exchange rate changes on cash and cash equivalents, and restricted cash | 2,710 | 18,866 | 75,672 | (147)
Net (decrease) increase in cash and cash equivalents, and restricted cash | (12,476) | (86,858) | 260,905 | (956)
Cash and cash equivalents, and restricted cash at the beginning of the year | 37,757 | 262,859 | 1,954 | 2,910
Cash and cash equivalents, and restricted cash at the end of the year | $ 25,281 | ¥ 176,001 | ¥ 262,859 | ¥ 1,954

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