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Operating revenue (Tables)
 12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of Disaggregation of revenue

 

   Year ended
December 31, 2024		   Year ended
December 31, 2023		 
Revenue from contracts with customers          
Good sales  $17,563,985   $23,777,952 
Schedule of Revenue For Geographical Regions

The Group derives revenue from the transfer of goods and services at a point in time in the following major product lines and geographical regions:

 

                 
Revenue from  external customer  contracts                
December 31, 2024  Europe   Other areas   Others   Total 
Bicycle frame  $13,224,192   $1,176,654   $-   $14,400,846 
Racket   939,656    745,181    -    1,684,837 
Crank   686,657    -    -    686,657 
Others   -    -    791,645    791,645 
Total  $14,850,505   $1,921,835   $791,645   $17,563,985 

 

                 
Revenue from  external customer  contracts                
December 31, 2023  Europe   Other areas   Others   Total 
Bicycle frame  $14,675,036   $543,969   $-   $15,219,005 
Racket   5,381,594    1,660,899    -    7,042,493 
Crank   -    -    -    0 
Others   -    -    1,516,454    1,516,454 
Total  $20,056,630   $2,204,868   $1,516,454   $23,777,952 
Schedule of Contract liabilities

  (a) The Group has recognized the following revenue-related contract liabilities:

 

   As of   As of 
   December 31, 2024   December 31, 2023 
Contract liabilities - receipts in advance  $108,165   $276,210 

  

(b)Revenue recognized that was included in the contract liability balance at the beginning of the year:

 

   Year ended
December 31, 2024		   Year ended
December 31, 2023		 
Revenue recognized from beginning contract liabilities  $276,210   $506,917 

 

a)Contract liabilities balance at the beginning of the year is fully recognized during the year.