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Unsecured senior notes (Tables) - Unsecured senior notes | 12 Months Ended
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Mar. 31, 2015
Unsecured senior notes |
Summary of the unsecured senior notes | The following table provides a summary of the Company's unsecured senior notes as of March 31, 2015:
|  |  | Amounts |  | Effective interest rate |
|  |  | (in millions of RMB) |  |  |
| US$300 million floating rate notes due 2017 |  |  | 1,843 |  |  | 0.85 | %
| US$1,000 million 1.625% notes due 2017 |  |  | 6,136 |  |  | 1.73 | %
| US$2,250 million 2.500% notes due 2019 |  |  | 13,770 |  |  | 2.64 | %
| US$1,500 million 3.125% notes due 2021 |  |  | 9,174 |  |  | 3.24 | %
| US$2,250 million 3.600% notes due 2024 |  |  | 13,795 |  |  | 3.66 | %
| US$700 million 4.500% notes due 2034 |  |  | 4,276 |  |  | 4.59 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  |  | 48,994 |  |  |  |
| Unamortized discount |  |  | 144 |  |  |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
| Total senior unsecured notes |  |  | 49,138 |  |  |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of future principal payments due | As of March 31, 2015, the future principal payments for the Company's senior unsecured notes will be due according to the following schedule:
|  |  | Principal amounts |
|  |  | (in millions of RMB) |
| Within 1 year |  |  | — |
| Between 1 to 2 years |  |  | — |
| Between 2 to 3 years |  |  | 7,985 |
| Between 3 to 4 years |  |  | — |
| Between 4 to 5 years |  |  | 13,820 |
| Thereafter |  |  | 27,333 |
​ | ​ | ​ | ​ | ​
|  |  |  | 49,138 |
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​

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