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Income tax (Schedule of Deferred Tax Assets and Liabilities) (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred tax assets: |  |
Logistics expenses accruals | ¥ 1,989 | ¥ 9,387
Inventory write-down | 5,404 | 3,702
Promotion expenses accruals | 1,270 | 1,682
Outsourced labor cost | 2,620 | 1,086
Promotion expenses paid but tax invoices not received | 186 | 1,184
Salary and welfare payable | 748 | 3,182
Professional fee accruals | 1,307 | 1,147
Marketing expenses accruals | 424 | 261
Allowance for doubtful accounts | 295 | 167
Other accruals | 1,034 | 583
Net operating loss carry forward | 5,452 | 7,802
Less: valuation allowance | (8,397) | (16,368)
Deferred tax assets, net | ¥ 12,332 | ¥ 13,815

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