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Intangible Assets
12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
7.
Intangible Assets

The following table summarizes the Group’s intangible assets:
                 
    
December 31,

2020
    
December 31,

2021
 
    
RMB
    
RMB
 
Gross carrying amount
                 
Copyright
     8,488        8,492  
Software
     2,851        3,080  
Trademark and others
     2,446        3,215  
    
 
 
    
 
 
 
Total gross carrying amount
  
 
13,785
 
  
 
14,787
 
    
 
 
    
 
 
 
Less: accumulated amortization
                 
Copyright
     (8,468      (8,696
Software
     (1,503      (2,032
Trademark and others
     (885      (1,814
    
 
 
    
 
 
 
Total accumulated amortization
  
 
(10,856
  
 
(12,542
    
 
 
    
 
 
 
Intangible assets, net
  
 
2,929
 
  
 
2,245
 
    
 
 
    
 
 
 
Amortization expense for the years ended December 31, 2019, 2020 and 2021 were RMB1.8 million, RMB1.6 million and RMB1.7 million, respectively.
 
The estimated amortization expenses for each of the following five years are as follows:
         
    
Amortization expense

of intangible assets
 
    
RMB
 
2022
     1,276  
2023
     660  
2024
     204  
2025
     91  
2026
     14