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Bank Loans (Tables)
3 Months Ended
Mar. 31, 2022
Debt Disclosure [Abstract]  
Schedule of short-term bank loans
    March 31,
2022
    December 31,
2021
 
Bank   (In thousands of
U.S. Dollars)
 
Shanghai Pudong Development Bank   $ 40,950     $ 39,200  
Industrial and Commercial Bank of China     20,475       21,952  
Nanjing Bank     7,875       7,840  
    $ 69,300     $ 68,992