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Taxation (Tables) | 12 Months Ended
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Dec. 31, 2014
Taxation |
Reconciliation of the differences between statutory tax rate and the effective tax rate |
|  | For the year ended December 31, |
|  | 2012 |  | 2013 |  | 2014 |
Statutory income tax rate |  | 25.0 | % | 25.0 | % | 25.0 | %
Tax effect of preferential tax treatments |  | 0.0 | % | 172.3 | % | 1.7 | %
Tax effect of tax-exempt entities |  | 0.3 | % | 54.7 | % | (22.4 | )%
Effect on tax rates in different tax jurisdiction |  | 0.2 | % | 22.1 | % | 0.1 | %
Tax effect of non-deductible expenses |  | (3.3 | )% | (148.4 | )% | (3.4 | )%
Tax effect of non-taxable income |  | 0.3 | % | 36.5 | % | 1.1 | %
Changes in valuation allowance |  | (22.0 | )% | (97.0 | )% | (0.5 | )%
Expiration of loss carry forward |  | (0.9 | )% | (65.1 | )% | (2.0 | )%
Effective tax rates |  | (0.4 | )% | 0.1 | % | (0.4 | )%
Schedule of deferred tax assets and deferred tax liabilities |
|  | As of December 31, |
|  | 2013 |  | 2014 |
|  | RMB |  | RMB |
Deferred tax assets |  |  |  |  |
- Allowance for doubtful accounts |  | 443 |  | 17,918 |
- Deferred revenues |  | 52,132 |  | 39,270 |
- Net operating loss carry forwards |  | 853,258 |  | 874,270 |
Less: valuation allowance |  | (905,833 | ) | (931,458 | )
Net deferred tax assets |  | — |  | — |
Current deferred tax liabilities |  |  |  |  |
- Interest income |  | 6,087 |  | 5,650 |
- Intangible assets arisen from business combination |  | — |  | 38,162 |
Total current deferred tax liabilities |  | 6,087 |  | 43,812 |
Schedule of movement of valuation allowance |
|  | As of December 31, |
|  | 2012 |  | 2013 |  | 2014 |
|  | RMB |  | RMB |  | RMB |
Balance at beginning of the period |  | 478,120 |  | 857,413 |  | 905,833 |
Additions |  | 399,568 |  | 81,119 |  | 156,820 |
Reversals |  | (20,275 | ) | (32,699 | ) | (131,195 | )
Balance at end of the period |  | 857,413 |  | 905,833 |  | 931,458 |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 + Details
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