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Organization and Nature of Operations (Details Textual) - USD ($)
1 Months Ended
Mar. 04, 2019
Aug. 21, 2018
Mar. 31, 2020
Oct. 31, 2019
Oct. 25, 2019
Mar. 31, 2019
Aug. 31, 2018
Feb. 09, 2018
Organization and Nature of Operations [Textual]                
Ownership percentage             100.00%  
Equity method investment, description   Mr. Wang Xuezhu and other shareholders of Fujian Happiness transferred their 100% ownership interests in Fujian Happiness to Happiness Nanping, which is 100% owned by Happiness Hong Kong. After the reorganization, Happiness Biotech owns 100% equity interests of Fujian Happiness. Mr. Wang Xuezhu, who owns 52.37% ownership of Happiness Biotech, is the ultimate controlling shareholder (“the Controlling Shareholder”) of the Company.            
Ordinary shares authorized 100,000,000   90,000,000     90,000,000    
Ordinary shares, par value $ 0.0005         $ 0.0005    
Ordinary shares, issued     25,000,000     23,000,000    
Ordinary shares, Outstanding     25,000,000     23,000,000    
Cancelled ordinary shares 77,223,100              
Purchase percentage       15.00%        
IPO [Member]                
Organization and Nature of Operations [Textual]                
Ordinary shares authorized         2,000,000      
Ordinary shares, par value         $ 0.0005      
Share per price         $ 5.50      
Total gross proceed         $ 11,000,000      
Total net proceeds         $ 9,342,339      
Purchase percentage         15.00%      
Ordinary shares                
Organization and Nature of Operations [Textual]                
Ordinary shares authorized 50,000              
Ordinary shares, par value $ 1              
Ordinary shares, issued               50,000
Cancelled ordinary shares 77,223,100              
Additional shares sold 223,100              
Mr. Wang Xuezhu [Member]                
Organization and Nature of Operations [Textual]                
Ownership percentage             47.70%