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Summary of Principal Accounting Policies (Details 2) - USD ($)
3 Months Ended 9 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
Cost of revenue $ (4,934,824) $ (4,261,058) $ (15,001,674) $ (10,072,216)
Gross profit (loss) 967,075 620,543 2,283,628 1,173,373
Amortization and depreciation (14,721) (45,734) (43,544) (53,351)
General and administrative expenses (1,521,114) (793,550) (4,145,775) (2,378,566)
Research & Development (158,055) (124,723) (438,033) (351,867)
Total operating expenses 2,031,080 1,301,974 5,591,170 3,324,717
Profit (loss) from operations (1,064,005) (681,431) (3,307,542) (2,151,344)
Interest income 955 1,009 2,672 1,415
Other income 26,497 65,469 78,686 88,729
Tax expense
Net profit (loss) $ (1,036,619) $ (708,153) (3,404,273) (2,247,253)
Variable Interest Entity, Primary Beneficiary [Member]        
Revenue     2,412,523 1,583,461
Cost of revenue     (727,879) (928,451)
Gross profit (loss)     1,684,644 655,010
Amortization and depreciation     (5,961) (5,216)
General and administrative expenses     (2,024,130) (1,393,511)
Research & Development     (438,033) (100,083)
Total operating expenses     (2,468,124) (1,498,810)
Profit (loss) from operations     (783,480) (843,800)
Interest income     2,569 1,344
Other income     13,996 14,263
Total other income (expense)     16,565 15,607
Tax expense    
Net profit (loss)     (766,915) (828,193)
Variable Interest Entity, Not Primary Beneficiary [Member]        
Revenue     14,741,361 9,662,128
Cost of revenue     (14,003,795) (9,143,765)
Gross profit (loss)     737,566 518,363
Amortization and depreciation     (719) (491)
General and administrative expenses     (503,737) (244,731)
Research & Development     (44,984)
Total operating expenses     (504,456) (290,206)
Profit (loss) from operations     233,110 228,157
Interest income     41 38
Other income     64,690 56,370
Total other income (expense)     64,731 56,408
Tax expense     (579)
Net profit (loss)     $ 297,841 $ 283,986