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Bonds Payable (Details) - Schedule of bonds payable - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Bonds payable      
Bonds payable, Total   $ 29,915
Long – term bonds payable      
Long-term bonds payable, Total $ 73,147 73,147 73,147
Third-party investors [Member]      
Bonds payable      
Bonds payable, Total   29,915
Huzhou Saiyuan [Member]      
Long – term bonds payable      
Long-term bonds payable, Total $ 73,147 $ 73,147 $ 73,147