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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2019 CNY (¥) ¥ / shares shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2018 CNY (¥) ¥ / shares shares | Dec. 31, 2017 CNY (¥) ¥ / shares shares
Revenues |  |  |  |  |
Revenues | $ 4,329,611 | ¥ 30,141,886 |  | ¥ 13,119,990 | ¥ 1,744,076
Costs of revenues |  |  |  |  |
Total costs of revenues | (910,508) | (6,338,778) |  | (2,905,249) | (722,830)
Gross profit | 3,419,103 | 23,803,108 |  | 10,214,741 | 1,021,246
Sales and marketing expenses | (3,903,337) | (27,174,249) |  | (13,441,813) | (1,344,582)
General and administrative expenses | (186,261) | (1,296,712) |  | (6,456,612) | (133,207)
Research and development expenses (including services received from a related party of RMB223,732 and RMB873,288(US$125,440) for the years ended December 31, 2018 and 2019, respectively) | (555,942) | (3,870,358) |  | (1,116,057) | (129,181)
Impairment of a long-term investment |  | 0 |  | 0 | (10,000)
Total operating expenses | (4,645,540) | (32,341,319) |  | (21,014,482) | (1,616,970)
Operating loss | (1,226,437) | (8,538,211) |  | (10,799,741) | (595,724)
Interest and investment gain, net | 221,469 | 1,541,825 |  | 584,940 | 80,783
Interest expense | (20,951) | (145,858) |  |  |
Foreign exchange (loss)/gain | 9,075 | 63,179 |  | 10,037 | (11,547)
Other income/(loss), net | 11,891 | 82,786 |  | (12,361) | 1,373
Loss before income tax and share of results of equity investees | (1,004,953) | (6,996,279) |  | (10,217,125) | (525,115)
Share of results of equity investees | 4,119 | 28,676 |  |  |
Net loss | (1,000,834) | (6,967,603) |  | (10,217,125) | (525,115)
Deemed distribution to certain holders of convertible preferred shares |  | (80,496) | $ (11,708) | (80,496) |
Contribution from a holder of convertible preferred shares |  |  |  |  | 26,413
Net loss attributable to ordinary shareholders | $ (1,000,834) | ¥ (6,967,603) |  | ¥ (10,297,621) | ¥ (498,702)
Loss per share: |  |  |  |  |
Basic | (per share) | $ (0.22) | ¥ (1.51) |  | ¥ (3.47) | ¥ (0.28)
Diluted | (per share) | $ (0.22) | ¥ (1.51) |  | ¥ (3.47) | ¥ (0.28)
Shares used in loss per share computation |  |  |  |  |
Basic | shares | 4,627,278,394 | 4,627,278,394 | 2,968,319,549 | 2,968,319,549 | 1,764,799,346
Diluted | shares | 4,627,278,394 | 4,627,278,394 | 2,968,319,549 | 2,968,319,549 | 1,764,799,346
Other comprehensive (loss)/income, net of tax of nil |  |  |  |  |
Foreign currency translation difference, net of tax of nil | $ 59,244 | ¥ 412,447 |  | ¥ 1,058,884 | ¥ (47,681)
Comprehensive loss | (941,590) | (6,555,156) |  | (9,158,241) | (572,796)
Online marketplace services |  |  |  |  |
Revenues |  |  |  |  |
Revenues | 4,329,611 | 30,141,886 |  | 13,119,990 | 1,740,691
Costs of revenues |  |  |  |  |
Total costs of revenues | $ (910,508) | ¥ (6,338,778) |  | ¥ (2,905,249) | (719,778)
Merchandise sales |  |  |  |  |
Revenues |  |  |  |  |
Revenues |  |  |  |  | 3,385
Costs of revenues |  |  |  |  |
Total costs of revenues |  |  |  |  | ¥ (3,052)

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