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Intangible assets, net (Tables) | 12 Months Ended
--- | ---
Mar. 31, 2023
Intangible assets, net |
Schedule of intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of March 31,
​ | ​ | 2023 | ​ | 2022
Software |  | $ | 5,610,547 |  | $ | 6,073,217
Courseware | ​ |  | 30,443,609 | ​ |  | 32,954,121
Copyrights | ​ |  | 12,266,906 | ​ |  | 13,275,393
​ | ​ |  | 48,321,062 | ​ |  | 52,302,731
Less: accumulated amortization | ​ |  | (39,999,028) | ​ |  | (36,970,335)
Less: impairment | ​ | ​ | (8,067,388) | ​ | ​ | —
Intangible assets, net | ​ | $ | 254,646 | ​ | $ | 15,332,396
Schedule of amortization amount of intangible asset | ​
​ | ​ | ​ | ​
2024 |  | $ | 72,602
2025 | ​ |  | 72,602
2026 | ​ |  | 72,602
2027 | ​ |  | 36,840
Total | ​ | $ | 254,646

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