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

ACCOUNTS RECEIVABLE, NET - Allowance for doubtful accounts (Details)

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ACCOUNTS RECEIVABLE, NET - Allowance for doubtful accounts (Details)
9 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CNY (¥)
Mar. 31, 2017
CNY (¥)
Mar. 31, 2016
CNY (¥)
Activity in allowance for doubtful accounts for accounts receivable        
Beginning allowance for doubtful accounts   ¥ 5,399,726 ¥ 4,875,266 ¥ 5,003,118
Additions charged to (reversal of) provision for doubtful accounts $ 209,567 1,363,506 694,460 (127,852)
Write-off of accounts receivable   (3,808,694)    
Ending allowance for doubtful accounts   ¥ 2,954,538 5,399,726 ¥ 4,875,266
Accounts receivable        
Activity in allowance for doubtful accounts for accounts receivable        
Additions charged to (reversal of) provision for doubtful accounts     ¥ 524,460