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SIGNIFICANT ACCOUNTING POLICIES - Acquired intangible assets (Details)	12 Months Ended
	Feb. 28, 2022
Trade name and domain names | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	1 year
Trade name and domain names | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	10 years
Copyrights and teaching materials | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	3 years
Copyrights and teaching materials | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	10 years
User base and customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	3 years
User base and customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	7 years
Technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	4 years
Technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	6 years
Partnership agreements and school cooperation agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	4 years
Partnership agreements and school cooperation agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	6 years
Licenses | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	2 years
Licenses | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	9 years
Others | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	1 year
Others | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period (in years)	7 years

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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X

- Details

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X

- Details

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X

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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