SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes & Value Added Tax (Details) - USD ($)		12 Months Ended
May 01, 2016	Jul. 31, 2020	Jul. 31, 2019
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Tax payable		$ 4,004,164	$ 669,069
Penalty expense		$ 77,527
Value Added Tax rate	6.00%	6.00%

Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_TaxesPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant