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v3.2.0.727

Summary of significant accounting policies (Details 3) - CNY (¥) | 12 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Summary of significant accounting policies |  |  |
Impairment of long-lived assets | ¥ 0 | ¥ 0 | ¥ 0
Minimum |  |  |
Summary of significant accounting policies |  |  |
Period of land use rights | 40 years |  |
Maximum |  |  |
Summary of significant accounting policies |  |  |
Period of land use rights | 70 years |  |
User base and customer relationships | Minimum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of intangible assets | 2 years |  |
User base and customer relationships | Maximum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of intangible assets | 6 years |  |
Trade names, trademarks and domain names | Minimum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of intangible assets | 3 years |  |
Trade names, trademarks and domain names | Maximum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of intangible assets | 12 years |  |
Developed technology and patents | Minimum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of intangible assets | 2 years |  |
Developed technology and patents | Maximum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of intangible assets | 5 years |  |
Non-compete agreements | Minimum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of intangible assets | 2 years |  |
Non-compete agreements | Maximum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of intangible assets | 6 years |  |
Computer equipment and software | Minimum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of property and equipment | 3 years |  |
Computer equipment and software | Maximum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of property and equipment | 5 years |  |
Furniture, office and transportation equipment | Minimum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of property and equipment | 3 years |  |
Furniture, office and transportation equipment | Maximum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of property and equipment | 5 years |  |
Buildings | Minimum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of property and equipment | 20 years |  |
Buildings | Maximum |  |  |
Summary of significant accounting policies |  |  |
Estimated useful lives of property and equipment | 50 years |  |

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28367520&loc=d3e92212-112881 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Impairment -URI http://asc.fasb.org/extlink&oid=6515133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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