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LAND USE RIGHTS, NET - Amortization Expense (Details) $ in Thousands, ¥ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jul. 08, 2019 CNY (¥) m² | Mar. 19, 2019 CNY (¥) m² item | Feb. 28, 2022 USD ($) | Feb. 28, 2021 USD ($) | Feb. 29, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Cost of land use rights |  |  |  |  | $ 6,780
Amortization of intangible assets |  |  | $ 13,905 | $ 24,030 | $ 15,677
LAND USE RIGHTS |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Number of land use rights acquired | item |  | 2 |  |  |
Useful life |  |  | 50 years |  |
Amortization of intangible assets |  |  | $ 4,600 | $ 4,345 |
Finite-Lived Intangible Assets, Net, Amortization Expense, Rolling Maturity [Abstract] |  |  |  |  |
2022 |  |  | 4,649 |  |
2023 |  |  | 4,649 |  |
2024 |  |  | 4,649 |  |
2025 |  |  | 4,649 |  |
2026 |  |  | 4,649 |  |
Thereafter |  |  | $ 194,463 |  |
LAND USE RIGHTS | Zhenjiang, Jiangsu |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Cost of land use rights | ¥ |  | ¥ 92 |  |  |
Number of square meters of land use rights acquired | m² |  | 83,025 |  |  |
LAND USE RIGHTS | Beijing |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Cost of land use rights | ¥ | ¥ 1,360 |  |  |  |
Number of square meters of land use rights acquired | m² | 28,600 |  |  |  |

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