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PRC statutory reserves (Details Narrative) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statutory Reserve Fund |  |  |
Statutory reserve | $ 2,452,000 | $ 3,174,000 | $ 3,174,000
Minimum Registered capital percentage | 25.00% |  |
Registered capital percentage | 50.00% |  |
Net income statutory reserve fund | 10.00% |  |
Statutory Staff Welfare Fund |  |  |
Statutory reserve | $ 12,000 | 12,000 |
Enterprise Expansion Fund |  |  |
Statutory reserve | $ 408,000 | $ 408,000 |
Minimum Registered capital percentage | 25.00% |  |

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