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Redeemable noncontrolling interests (Tables) | 12 Months Ended
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Dec. 31, 2017
Redeemable non-controlling interests | The redeemable noncontrolling interests for the years ended December 31, 2016 and 2017 are summarized below:
|  | RMB |
Balance at December 31, 2016 |  |  | — |
Issuance |  |  | 635,795 |
Accretion |  |  | 13,451 |
Balance at December 31, 2017 |  |  | 649,246 |
Balance at December 31, 2017 in US$ |  |  | 99,787 |

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- Definition Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration