v3.22.2.2
Summary of significant accounting policies (Details Narrative) - USD ($)
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Property, Plant and Equipment [Line Items]    
Cash $ 101,719 $ 194,590
Impairment of long-lived assets 0 0
Employee benefits expenses $ 78,685 $ 42,065
Ordinary shares 13,000  
Diluted loss per share   0
Revenues $ 2,328,526 $ 1,635,420
Accounts receivable 194,138 $ 264,749
Revenue Benchmark [Member]    
Property, Plant and Equipment [Line Items]    
Concentration   10.00%
Revenue Benchmark [Member] | Three Customer    
Property, Plant and Equipment [Line Items]    
Revenues $ 652,478 $ 602,969
Concentration 28.00% 38.60%
Accounts receivable $ 122,402 $ 151,389
Revenue Benchmark [Member] | Two Vendors [Member]    
Property, Plant and Equipment [Line Items]    
Revenues $ 108,512 $ 87,439
Concentration 73.60% 86.40%
Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Value added tax rate 9.00%  
Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Value added tax rate 13.00%