SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues by business lines
Total revenues	$ 1,392,870	$ 5,921,166	$ 2,541,866	$ 11,015,606
Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	1,390,396	5,885,287	2,537,312	10,897,850
Discontinued Operations
Revenues by business lines
Online Lending Services	2,474	35,879	4,554	117,756
Revenues from Sales of Automobiles [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	83,787	4,886,518	423,632	8,866,629
Operating lease revenues from automobile rentals [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	787,955	0	1,196,433	0
Service fees from automobile purchase services [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	75,038	600,684	160,577	1,257,010
Facilitation fees from automobile transaction [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	16	41,764	1,616	143,263
Service fees from management and guarantee services [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	161,043	97,840	273,601	184,655
Financing revenues [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	62,404	47,121	104,434	61,264
Other service fees [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	220,153	211,360	377,019	385,029
Transaction fees [Member] | Discontinued Operations
Revenues by business lines
Online Lending Services	1,503	13,479	2,516	70,454
Service fees [Member] | Discontinued Operations
Revenues by business lines
Online Lending Services	971	8,313	2,038	21,857
Website Development Revenues from Online Lending Services [Member] | Discontinued Operations
Revenues by business lines
Online Lending Services	$ 0	$ 14,087	$ 0	$ 25,445