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FINANCIAL INFORMATION OF PARENT COMPANY (Narrative) (Details) - 12 months ended Dec. 31, 2016	$ / ¥	Total
Foreign Currency Exchange Rate Weighted Average Translation Rate	6.9430	6.943

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- Definition

Weighted Average Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

+ References

No definition available.

+ Details

Name:	bzun_ForeignCurrencyExchangeRateWeightedAverageTranslationRate
Namespace Prefix:	bzun_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration