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

COMMITMENTS AND CONTINGENCIES - Lease Commitments (Details)

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COMMITMENTS AND CONTINGENCIES - Lease Commitments (Details) - CNY (¥)
9 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Mar. 31, 2017
Year ended December 31:      
2019   ¥ 2,959,829  
2020   346,745  
Total   3,306,574  
Rental expense for operating leases ¥ 4,772,679 ¥ 2,717,234 ¥ 6,089,419
Minimum      
Lease commitments      
Operating lease term   12 months  
Maximum      
Lease commitments      
Operating lease term   36 months  
Leases not renewed      
Operating lease term which were not renewed   1 month