SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Revenues by business lines
Total revenues	$ 2,749,873	$ 209,857	$ 13,756,047	$ 406,391
Continuing Operations
Revenues by business lines
Total revenues	2,745,579	118,736	13,643,429	118,736
Discontinued operations
Revenues by business lines
Total revenues	(4,294)	(91,121)	(112,618)	(287,655)
Revenues from Sales of Automobiles [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	1,987,433	0	10,828,063	0
Service fees from automobile purchase services [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	352,351	70,654	1,609,361	70,654
Facilitation fees from automobile transaction [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	21,031	16,424	164,294	16,424
Service fees from management and guarantee services [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	128,893	21,332	313,548	21,332
Financing Revenues from Automobile Transaction and Related Services [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	44,149	0	105,413	0
Other Service fees [Member] | Continuing Operations
Revenues by business lines
Automobile Transaction and Related Services	211,722	10,326	622,750	10,326
Transaction fees [Member] | Discontinued operations
Revenues by business lines
Online Lending Services	1,160	80,564	72,394	261,450
Service fees [Member] | Discontinued operations
Revenues by business lines
Online Lending Services	3,134	10,557	24,990	26,205
Website Development Revenues from Online Lending Services [Member] | Discontinued operations
Revenues by business lines
Online Lending Services	$ 0	$ 0	$ 15,234	$ 0