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Summary of significant accounting policies (Details Narrative)
12 Months Ended 24 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
Dec. 31, 2019
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
$ / shares
Working capital $ 537,911 $ 783,444 $ 537,911
Comprehensive loss (1,796,133) (1,719,416)  
Net cash provided (used) by operating activities (427,442) (465,076)  
Allowances for doubtful accounts $ 43,068 $ 37,898  
Estimated residual value, percentage   5.00%  
Description of Value Added Tax The Company’ revenue is subject to a VAT rate of 17% before April 30, 2018, a VAT rate of 16% from May 1, 2018 to March 31, 2019 and a VAT rate of 13% from April 1, 2019 onwards.    
Cash and cash equivalents $ 55,950 $ 468,229 55,950
Offering cost     $ (133,480)
Average Translation Rate [Member]      
Exchange rate on liability | $ / shares $ 1.00 $ 1.00 $ 1.00
Foreign Currency Exchange Rate, Translation 6.8976 6.8985 6.8976
USD to RMB [Member]      
Exchange rate on liability | $ / shares $ 1.00 $ 1.00 $ 1.00
Foreign Currency Exchange Rate, Translation 6.5249 6.9762 6.5249
Deferred IPO Costs [Member]      
Offering cost $ 133,480