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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

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

INCOME TAX (Details)	12 Months Ended
INCOME TAX (Details)	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
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-Commerce \| High Technology Enterprises
INCOME TAX
Preferential tax rate (as a percent)	15.00%
Horgos Economic District \| Horgos Qinhe
INCOME TAX
Preferential tax rate (as a percent)	0.00%
Period for preferred income tax rate	5 years
Horgos Economic District \| Horgos Bozhishuntai
INCOME TAX
Preferential tax rate (as a percent)	0.00%
Period for preferred income tax rate	5 years