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Other comprehensive income/(loss) (Tables) | 12 Months Ended
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Dec. 31, 2017
Other comprehensive income/(loss) |
Schedule of changes in the composition of accumulated other comprehensive income/(loss) |
|  | Foreign currency translation adjustments |  | Net unrealized gains/(losses) on available-for-sale securities |  | Total |
|  | RMB |  | RMB |  | RMB |
Balances as of December 31, 2014 |  | (413,452 | ) | 37,327 |  | (376,125 | )
Other comprehensive income/(loss) |  | 953,573 |  | (22,622 | ) | 930,951 |
Balances as of December 31, 2015 |  | 540,121 |  | 14,705 |  | 554,826 |
Other comprehensive income |  | 943,616 |  | 44,951 |  | 988,567 |
Balances as of December 31, 2016 |  | 1,483,737 |  | 59,656 |  | 1,543,393 |
Other comprehensive income/(loss) |  | (822,052 | ) | 1,120,740 |  | 298,688 |
Balances as of December 31, 2017 |  | 661,685 |  | 1,180,396 |  | 1,842,081 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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