v3.26.1
Schedule of long-term investment (Details)
12 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2025
CNY (¥)
Schedule of Equity Method Investments [Line Items]      
Balance as of March 31, 2025 $ 13,159,074    
Share gain (loss) from equity investments    
Loss due to valuation    
Impairment (5,305,764)    
Foreign currency translation adjustments 372,327    
Balance as of March 31, 2026 8,225,637 $ 13,159,074  
Fujian Pingtan Ocean Fishery Group Co. Ltd [Member]      
Schedule of Equity Method Investments [Line Items]      
Balance as of March 31, 2025    
Share gain (loss) from equity investments    
Loss due to valuation (3,471,165) ¥ (24,916,714)
Impairment    
Foreign currency translation adjustments    
Balance as of March 31, 2026  
Changsha Tangshi Yipai Medical Technology Co Ltd [Member]      
Schedule of Equity Method Investments [Line Items]      
Balance as of March 31, 2025 13,159,074    
Share gain (loss) from equity investments    
Loss due to valuation    
Impairment (5,305,764)    
Foreign currency translation adjustments 372,327    
Balance as of March 31, 2026 8,225,637 13,159,074  
Yaping Zhou [Member]      
Schedule of Equity Method Investments [Line Items]      
Balance as of March 31, 2025    
Share gain (loss) from equity investments    
Loss due to valuation    
Impairment    
Foreign currency translation adjustments    
Balance as of March 31, 2026