Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

COMMON SHARES (Details)

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COMMON SHARES (Details)
$ in Millions
12 Months Ended
Mar. 31, 2015
CNY (¥)
shares
Mar. 31, 2014
CNY (¥)
shares
Mar. 31, 2013
CNY (¥)
shares
Aug. 05, 2014
USD ($)
Nov. 01, 2012
USD ($)
Common shares          
Repurchase price ¥ 8,362,136 ¥ 132,528 ¥ 329,357    
ADS          
Common shares          
Authorized amount to be repurchased (in dollars) | $       $ 5 $ 5
Common share          
Common shares          
Shares repurchased | shares 612,314 10,678 26,440    
Repurchase price ¥ 8,362,136 ¥ 132,528 ¥ 329,357