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CONSOLIDATED STATEMENTS OF CASH FLOWS ¥ 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: |  |  |  |
Share-based compensation | 7,797 | 54,281 | 51,359 | 9,921
Depreciation and amortization | 1,676 | 11,668 | 11,266 | 14,820
(Gain) loss on disposal of property and equipment | (1) | (5) | 1,110 | (10)
Inventory provision | 113 | 790 |  |
Impairment loss | 1,580 | 11,000 |  |
Investment Income | (1,384) | (9,635) | (10,869) |
Noncash lease expense | 3,648 | 25,394 |  |
Changes in operating assets and liabilities: |  |  |  |
Accounts receivable | (5,268) | (36,678) | (8,171) | 7,990
Notes receivable | (3,388) | (23,587) |  |
Inventories | (39,677) | (276,225) | (66,780) | (9,322)
Prepayments and other current assets | (6,818) | (47,457) | (56,329) | (7,459)
Other non-current assets | 53 | 367 | (3,376) |
Accounts payable | 33,336 | 232,076 | 84,118 | 30,157
Accrued expenses and other current liabilities | 10,684 | 74,376 | 28,560 | (1,142)
Operating lease liabilities | (3,551) | (24,721) |  |
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: |  |  |  |
Purchases of property and equipment | (2,877) | (20,030) | (14,443) | (6,798)
Purchases of intangible assets | (658) | (4,580) | (376) | (62)
Purchase of long-term investments |  |  |  | (140)
Purchase of short-term investments | (86,328) | (601,000) | (519,187) | (109,380)
Proceeds from sale or maturity of short-term investments | 123,977 | 863,106 | 578,359 | 80,198
Proceeds from disposition of property and equipment, net | 26 | 179 | 101 | 57
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 from short-term bank borrowings | 21,678 | 150,919 |  |
Repayment of short-term bank borrowings | (8,021) | (55,838) |  |
Net proceeds from other financing activities | 3,673 | 25,569 |  |
Proceeds from 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
Supplemental disclosure of cash flow information: |  |  |  |
Interest paid | 117 | 818 |  |
Income tax paid |  |  | 8 |
Supplemental disclosures of non-cash investing and financing activities: |  |  |  |
Change in fair value of available-for-sale investments | 1,054 | 7,335 | 8,734 | 5,181
Purchases of property and equipment included in payables | $ 163 | ¥ 1,133 | ¥ 848 | ¥ 164

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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition The cash inflow from sales, maturities, prepayments, calls and collections of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition The cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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