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LOANS RECEIVABLE (Details)
12 Months Ended
Jul. 31, 2018
USD ($)
Jul. 31, 2019
USD ($)
Jul. 31, 2018
CNY (¥)
Jul. 31, 2018
USD ($)
LOANS RECEIVABLE        
Short-term loan receivable   $ 0 ¥ 18,743,157 $ 2,750,078
Interest rate (in percent) 5.00%      
Interest income $ 15,536