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Revenues (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
Revenues |  |  |  |
Revenues | $ 4,329,611 | ¥ 30,141,886 | ¥ 13,119,990 | ¥ 1,744,076
Online marketplace services |  |  |  |
Revenues |  |  |  |
Revenues | 4,329,611 | 30,141,886 | 13,119,990 | 1,740,691
Online marketing services |  |  |  |
Revenues |  |  |  |
Revenues | 3,851,539 | 26,813,641 | 11,515,575 | 1,209,275
Transaction services |  |  |  |
Revenues |  |  |  |
Revenues | $ 478,072 | ¥ 3,328,245 | ¥ 1,604,415 | 531,416
Merchandise sales |  |  |  |
Revenues |  |  |  |
Revenues |  |  |  | ¥ 3,385

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