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Segment Information (Tables)
9 Months Ended
Sep. 30, 2020
Segment Reporting [Abstract]  
Schedule of segment reporting information by segment
The table below provides a summary of the Group’s segment results for the nine months ended September 30, 2019 and 2020.
 
    
For the nine months ended
September 30,
 
    
2019
   
2020
 
    
RMB
   
RMB
 
Net revenues
                
Learning services and products
     539,957       1,725,672  
Online marketing services
     354,494       335,047  
    
 
 
   
 
 
 
Total net revenues
  
 
894,451
 
 
 
2,060,719
 
    
 
 
   
 
 
 
Cost of revenues
                
Learning services and products
     400,035       885,756  
Online marketing services
     246,224       246,146  
    
 
 
   
 
 
 
Total cost of revenues
  
 
646,259
 
 
 
1,131,902
 
    
 
 
   
 
 
 
Gross margin
                
Learning services and products
     26     49
Online marketing services
     31     27
Total gross margin
  
 
28
 
 
45