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

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Employee benefit plans (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Employee benefit plans (Details) - CNY (¥)
 9 Months Ended 12 Months Ended
Dec. 31, 2017
Mar. 31, 2017
Mar. 31, 2016
Employee benefit plans      
Expense due to employee benefit plans ¥ 18,203,748 ¥ 20,850,441 ¥ 18,897,889
Cost of revenues      
Employee benefit plans      
Expense due to employee benefit plans 5,312,695 6,841,587 6,334,414
Research and development      
Employee benefit plans      
Expense due to employee benefit plans 5,952,564 6,435,010 5,810,237
Sales and marketing      
Employee benefit plans      
Expense due to employee benefit plans 4,228,981 4,463,283 4,169,401
General and administrative      
Employee benefit plans      
Expense due to employee benefit plans ¥ 2,709,508 ¥ 3,110,561 ¥ 2,583,837