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
9 Months Ended 12 Months Ended
Dec. 31, 2017
CNY (¥)
shares
Mar. 31, 2017
CNY (¥)
shares
Mar. 31, 2016
CNY (¥)
shares
Sep. 24, 2015
USD ($)
Aug. 05, 2014
USD ($)
Nov. 01, 2012
USD ($)
Common shares            
Repurchase price     ¥ 19,536,028      
ADS            
Common shares            
Authorized amount to be repurchased (in dollars) | $       $ 3.0 $ 5.0 $ 5.0
Common share            
Common shares            
Shares repurchased | shares 0 0 1,134,264      
Repurchase price ¥ 0 ¥ 0 ¥ 19,536,028