Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.4)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

INCOME TAXES (Details)	12 Months Ended
INCOME TAXES (Details)	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
INCOME TAX
Statutory tax rate (as a percent)	25.00%	25.00%	25.00%
PRC
INCOME TAX
Statutory tax rate (as a percent)	25.00%
PRC \| Hexin E Digital \| High Technology Enterprises
INCOME TAX
Preferential tax rate (as a percent)	15.00%