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Other liabilities
 12 Months Ended
Dec. 31, 2020
Other Liabilities [Abstract]  
Other Liabilities
25. Other liabilities
 
   
December 31,
2020
   
December 31,
2019
 
Cash dividends payable (see note 26)
   14,500,000    —   
Miscellaneous creditors
   8,824,128    7,018,393 
Other collections and withholdings
   5,163,932    4,186,674 
Short term personnel benefits
   5,044,814    5,708,980 
Advance collections
   4,958,065    3,548,845 
Other taxes payable
   1,348,935    1,659,555 
Contract liabilities
   400,421    522,449 
Long term personnel benefits
   393,701    417,251 
Social security payable
   99,339    83,638 
Others
   89,881    106,712 
   
 
 
   
 
 
 
TOTAL
  
 
40,823,216
 
  
 
23,252,497