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Employee Benefit Plans (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Contributions by employer	¥ 60,134	¥ 35,947	¥ 20,339

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- Definition

Amount of contribution by the employer to employee benefit plans. The entity's PRC subsidiaries are required by law to contribute a certain percentages of applicable salaries for retirement benefits, medical insurance benefits, housing funds, unemployment and other statutory benefits. The PRC government is directly responsible for the payments of such benefits.

+ References

No definition available.

+ Details

Name:	bzun_EmployeeBenefitPlansContributionsByEmployer
Namespace Prefix:	bzun_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration