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ADDITIONAL FINANCIAL INFORMATION - FINANCIAL STATEMENTS SCHEDULE I - STATEMENTS OF COMPREHENSIVE LOSS (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 expenses: |  |  |  |
General and administrative expenses | $ (17,740) | ¥ (123,501) | ¥ (98,759) | ¥ (53,434)
Other operating income (expense), net | (536) | (3,735) | (668) | 2,732
Other income, net | 120 | 834 | 11,531 | 4,229
Loss before income taxes | (72,083) | (501,827) | (382,033) | (249,327)
Net Income (Loss) Available to Common Stockholders, Basic | (71,764) | (499,606) | (380,091) | (248,580)
Net loss | (72,083) | (501,827) | (382,041) | (249,327)
Net loss attributable to ordinary shareholders | (71,764) | (499,606) | (380,091) | (248,580)
Other comprehensive income (loss) |  |  |  |
Unrealized gains of available-for-sale securities, net of tax of nil for 2017, 2018 and 2019 | 1,054 | 7,335 | 8,734 | 5,181
Realized gains of available-for-sale securities, net of tax | (1,384) | (9,635) | (10,869) | (1,154)
Foreign currency translation adjustments | 1,676 | 11,668 | 21,658 | (21,347)
Comprehensive loss | (70,418) | (490,238) | (360,568) | (265,900)
Parent |  |  |  |
Operating expenses: |  |  |  |
General and administrative expenses | (1,224) | (8,523) | (2,145) | (834)
Interest income (expense), net | 85 | 593 | 371 |
Other operating income (expense), net |  |  | 31 |
Other income, net | 1,029 | 7,161 | 3,253 |
Loss before income taxes | (110) | (769) | 1,510 | (834)
Share of loss of subsidiaries and VIEs | (71,654) | (498,837) | (381,601) | (247,746)
Net Income (Loss) Available to Common Stockholders, Basic | (71,764) | (499,606) | (380,091) | (248,580)
Net loss | (71,764) | (499,606) | (380,091) | (248,580)
Net loss attributable to ordinary shareholders | (71,764) | (499,606) | (380,091) | (248,580)
Other comprehensive income (loss) |  |  |  |
Unrealized gains of available-for-sale securities, net of tax of nil for 2017, 2018 and 2019 | 482 | 3,356 | (286) | 2,196
Realized gains of available-for-sale securities, net of tax | (713) | (4,962) | (399) |
Foreign currency translation adjustments | 1,676 | 11,668 | 21,658 | (21,347)
Unrealized securities holding gains (loss) of subsidiaries and VIEs, net of tax of nil for 2017, 2018 and 2019 | 572 | 3,979 | 9,020 | 1,831
Realized securities holding loss of subsidiaries and VIEs, net of tax of nil for 2017, 2018 and 2019 | (671) | (4,673) | (10,470) |
Comprehensive loss | $ (70,418) | ¥ (490,238) | ¥ (360,568) | ¥ (265,900)

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