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SIGNIFICANT ACCOUNTING POLICIES - Property and equipment, net (Details)
12 Months Ended
Feb. 28, 2022
Building | Minimum  
Property, plant and equipment  
Useful life (in years) 35 years
Building | Maximum  
Property, plant and equipment  
Useful life (in years) 64 years
Computer, network equipment and software  
Property, plant and equipment  
Useful life (in years) 3 years
Vehicles | Minimum  
Property, plant and equipment  
Useful life (in years) 4 years
Vehicles | Maximum  
Property, plant and equipment  
Useful life (in years) 5 years
Office equipment and furniture | Minimum  
Property, plant and equipment  
Useful life (in years) 3 years
Office equipment and furniture | Maximum  
Property, plant and equipment  
Useful life (in years) 5 years