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PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($)
Jul. 31, 2019
Jul. 31, 2018
PREPAID EXPENSES AND OTHER CURRENT ASSETS    
Advance to employees for business development purposes (a) $ 700,940 $ 595,397
Prepaid consulting service fees (b) 891,098  
Prepayment for advertising services (c ) 400,895  
Security deposits for operating lease and auto license plate (d) 155,397 98,971
Advance to vendor for fixed assets purchase (e) 248,349  
Advance to vendor for a trading platform development (f) 180,000  
Interest receivable (g)   14,819
Others (h ) 78,653 12,630
Prepaid Expense and Other Assets, Current $ 2,655,332 $ 721,817