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v3.19.1

Fair value measurement (Details 3) ¥ in Thousands, $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Sep. 21, 2018 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 CNY (¥)
Investment securities |  |  |  |  |  |
Cumulative effect of changes in accounting principles related to financial instruments |  |  |  |  |  | ¥ 295,965
Cost Basis |  |  | ¥ 9,087,935 |  |  | 16,071,098
Gross Unrealized Gains |  |  | 1,476,834 |  |  | 3,952,704
Gross Unrealized Losses |  |  | (513,047) |  |  | (4,122,229)
Provision for decline in value |  |  | (23,909) |  |  |
Fair Value |  |  | 10,027,813 |  | $ 2,312,788 | 15,901,573
Others, net |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Impairment of investments |  | ¥ 593,138 | 59,987 | ¥ 341,984 |  |
Significant Other Observable Inputs (Level 2) |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Unsecured senior notes |  |  | 6,527,960 |  |  | 6,382,604
Significant Unobservable Inputs (Level 3) | Nonrecurring basis | Others, net |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Impairment of investments |  | 593,138 | 59,987 | ¥ 341,984 |  |
Time deposits | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Cash equivalents |  |  | 5,081,748 |  |  | 12,050,507
China Unicom |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Gross Unrealized Losses |  |  | ¥ 366,032 |  |  | (1,215,227)
Percentage of outstanding ordinary shares subscribed or held |  |  | 2.40% |  |  |
Total consideration for the investment |  |  | ¥ 5,000,000 |  |  |
Vipshop |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Gross Unrealized Losses |  |  | ¥ 37,064 |  |  | (2,004,447)
Percentage of outstanding ordinary shares subscribed or held |  |  | 5.50% |  |  |
Total consideration for the investment |  | ¥ 1,016,858 | ¥ 2,794,547 |  |  |
Farfetch |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Gross Unrealized Gains |  |  |  |  |  | 2,250,113
Total consideration for the investment | ¥ 186,155 |  | ¥ 2,713,285 |  |  |
Accumulated other comprehensive income/(loss) |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Cumulative effect of changes in accounting principles related to financial instruments |  |  |  |  |  | (1,156,642)
Accumulated deficit |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Cumulative effect of changes in accounting principles related to financial instruments |  |  |  |  |  | 1,452,607
ASU 2016-01 | Adjustments | Accumulated other comprehensive income/(loss) |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Cumulative effect of changes in accounting principles related to financial instruments |  |  |  |  |  | (1,156,642)
ASU 2016-01 | Adjustments | Accumulated deficit |  |  |  |  |  |
Investment securities |  |  |  |  |  |
Cumulative effect of changes in accounting principles related to financial instruments |  |  |  |  |  | ¥ 1,156,642

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