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SHORT-TERM INVESTMENTS (Details) - USD ($) $ in Thousands	Feb. 28, 2022	Feb. 28, 2021
SHORT-TERM INVESTMENTS
Held-to-maturity investments	$ 580,352	$ 1,927,862
Variable-rate financial instruments	150,000	457,723
Available-for-sale securities	340,183	308,970
Short-term investments	$ 1,070,535	$ 2,694,555

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Wealth management products which indexed to certain stock, stock market or foreign exchange with maturities less than one year.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity), classified as current.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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