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Net income (loss) per share (Schedule of Basic and Diluted Net Loss Per Share) (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 CNY (¥) ¥ / shares shares | Dec. 31, 2016 USD ($) $ / shares shares | Dec. 31, 2015 CNY (¥) ¥ / shares shares | Dec. 31, 2014 CNY (¥) ¥ / shares shares
Numerator: |  |  |  |
Net income (loss) | ¥ 85,424 | $ 12,303 | ¥ 22,621 | ¥ (59,814)
Change in redemption value of preferred shares |  |  | (25,332) | (79,169)
Deemed dividend from issuance of convertible redeemable preferred shares |  |  |  | (16,666)
Net loss attributable to noncontrolling interests | 1,209 | 174 |  |
Net income (loss) attributable to ordinary shareholders of Baozun Inc. | ¥ 86,633 | $ 12,477 | ¥ (2,711) | ¥ (155,649)
Net income (loss) per share |  |  |  |
Basic | (per share) | ¥ 0.58 | $ 0.08 | ¥ (0.03) | ¥ (5.31)
Diluted | (per share) | ¥ 0.53 | $ 0.08 | ¥ (0.03) | ¥ (5.31)
Weighted average number of ordinary shares |  |  |  |
Basic | shares | 149,935,100 | 149,935,100 | 102,987,119 | 29,314,067
Diluted | shares | 163,926,674 | 163,926,674 | 102,987,119 | 29,314,067
American Depositary Shares [Member] |  |  |  |
Net income (loss) per share |  |  |  |
Basic | ¥ / shares | ¥ 1.74 |  | ¥ (0.08) | ¥ (15.93)
Diluted | ¥ / shares | ¥ 1.59 |  | ¥ (0.08) | ¥ (15.93)

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