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ORGANIZATION AND PRINCIPAL ACTIVITIES - Financial information (Details)
¥ in Thousands, $ in Thousands
 12 Months Ended
Feb. 28, 2022
USD ($)
Feb. 28, 2021
USD ($)
Feb. 29, 2020
USD ($)
Feb. 28, 2022
CNY (¥)
Feb. 28, 2021
CNY (¥)
Balance Sheet          
Cash and cash equivalents $ 1,638,189 $ 3,242,953   ¥ 1,180,475 ¥ 1,754,509
Other current assets 8,069 11,350      
Total current assets 3,629,376 8,156,835      
Property and equipment, net 281,226 511,415      
Other non-current assets 4,852 17,982      
Total assets 5,082,528 12,112,309      
Deferred revenue-current 187,718 1,387,493      
Other current liabilities 45,870 48,227      
Total current liabilities 902,584 3,373,851      
Total liabilities 1,080,266 6,907,753      
Income And Cash Flow Statement          
Net revenues 4,390,907 4,495,755 $ 3,273,308    
Net income (1,164,335) (143,050) (127,651)    
Net cash provided by / (used in) operating activities (939,184) 954,732 855,850    
Net cash used in investing activities 1,368,716 (2,641,469) (338,815)    
Net cash provided by financing activities (2,766,679) 4,794,813 131,231    
VIE's          
Balance Sheet          
Cash and cash equivalents 359,208 820,301      
Other current assets 276,804 324,568      
Total current assets 636,012 1,144,869      
Property and equipment, net 206,030 430,137      
Other non-current assets 883,759 2,555,459      
Total assets 1,725,801 4,130,465      
Deferred revenue-current 182,337 1,328,473      
Other current liabilities 583,051 1,488,763      
Total current liabilities 765,388 2,817,236      
Total non-current liabilities 164,169 1,163,622      
Total liabilities 929,557 3,980,858      
Income And Cash Flow Statement          
Net revenues 4,193,212 4,244,907 3,058,285    
Net income 186,848 488,866 534,070    
Net cash provided by / (used in) operating activities (1,418,908) (1,034,695) 1,747,371    
Net cash used in investing activities (194,349) (224,235) (1,674,658)    
Net cash provided by financing activities 1,536,258 1,758,838 3,071    
VIEs and VIEs' subsidiaries, excluding inter-company transactions          
Income And Cash Flow Statement          
Net cash provided by / (used in) operating activities 117,350 727,661 215,892    
Net cash used in investing activities 194,349 224,235 134,936    
Net cash provided by financing activities $ 0 $ 3,518 $ 5,173