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Related Party Transactions - Related Party Transactions (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Related Party Transaction [Line Items]        
Revenues ¥ 54,163 $ 8,499 ¥ 31,740 ¥ 12,366
Cost of revenue 25,351 3,979 258 0
Selling and marketing expenses 2,500 392 8,681 5,837
General and administrative expenses 1,145 180 0 750
Loans provided to related party 250 39 33,558 12,985
Repayment of loans provided to related parties 2,220 348 12,555 3,603
Interest income 18 3 1,516 279
Investment and loans receivable disposal transactions     3,152  
Alnilam        
Related Party Transaction [Line Items]        
Revenues     2,346 4,029
Cost of revenue     163  
Loans provided to related party       5,649
Repayment of loans provided to related parties     7,185 1,603
Interest income     773 253
Rock&Roll        
Related Party Transaction [Line Items]        
Revenues 9,999 1,569    
Cost of revenue 3,364 528    
Sunwah        
Related Party Transaction [Line Items]        
Revenues 359 56    
Cost of revenue 15,349 2,409    
GZ Skyline        
Related Party Transaction [Line Items]        
Cost of revenue 4,738 744    
Selling and marketing expenses 143 22    
SH Skyline        
Related Party Transaction [Line Items]        
Cost of revenue 1,224 192    
General and administrative expenses 1,145 180    
Marvelousmart        
Related Party Transaction [Line Items]        
Cost of revenue 676 106    
GZ Raspberry        
Related Party Transaction [Line Items]        
Loans provided to related party 250 39    
Repayment of loans provided to related parties 250 39    
Interest income 1      
Pan Hai.        
Related Party Transaction [Line Items]        
Loans provided to related party     1,500  
Interest income 12 2 51  
Zi Jun        
Related Party Transaction [Line Items]        
Revenues     657 309
Cost of revenue     95  
Loans provided to related party     18,618 3,736
Interest income     518 26
Newton Education        
Related Party Transaction [Line Items]        
Revenues       71
HK Fairlady        
Related Party Transaction [Line Items]        
Revenues 43,422 6,814 28,639 7,957
General and administrative expenses       750
Yi Xin        
Related Party Transaction [Line Items]        
Revenues 81 13 98  
Selling and marketing expenses 2,028 318 8,681 5,837
Loans provided to related party     8,600 3,400
Repayment of loans provided to related parties     1,000 2,000
Investment and loans receivable disposal transactions     3,000  
Zhi Nao        
Related Party Transaction [Line Items]        
Loans provided to related party       ¥ 200
Explorer        
Related Party Transaction [Line Items]        
Loans provided to related party     3,960  
Repayment of loans provided to related parties     3,960  
Interest income     156  
Pan Hai        
Related Party Transaction [Line Items]        
Repayment of loans provided to related parties 1,500 235    
Jun Mi        
Related Party Transaction [Line Items]        
Revenues 302 47    
Selling and marketing expenses 329 52    
Loans provided to related party     880  
Repayment of loans provided to related parties 470 74 410  
Interest income ¥ 5 $ 1 18  
Investment and loans receivable disposal transactions     ¥ 152