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CONSOLIDATED BALANCE SHEETS (Parenthetical)
¥ in Thousands, $ in Thousands
Dec. 31, 2018
CNY (¥)
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Mar. 31, 2018
shares
Dec. 31, 2017
CNY (¥)
shares
Dec. 31, 2017
$ / shares
Sep. 18, 2015
$ / shares
shares
Sep. 18, 2015
¥ / shares
shares
Accrued expenses and other current liabilities ¥ 455,284 $ 66,218   ¥ 235,900      
Deferred revenue, current 1,765,085 256,721   1,325,954      
Payables to acquire buildings 61,540 8,951   240,390      
Long-term debt, current 32,500 4,727          
Deferred revenue, non-current 1,520,940 221,212   ¥ 784,474      
Other non-current liabilities 17,147 2,494          
Long-term debt, non-current ¥ 225,625 $ 32,816          
Ordinary shares, par value | (per share)   $ 0.00005     $ 0.00005 $ 0.00005 ¥ 0.0003
Ordinary shares, shares authorized 1,000,000,000 1,000,000,000   1,000,000,000   1,000,000,000 1,000,000,000
Ordinary shares, shares issued       4,329,000   1 1
Ordinary shares, shares outstanding     4,329,000 4,329,000      
Class A Ordinary Shares              
Ordinary shares, par value | $ / shares   $ 0.00005     0.00005    
Ordinary shares, shares authorized 796,062,195 796,062,195   796,062,195      
Ordinary shares, shares issued 1,818,383 1,818,383          
Ordinary shares, shares outstanding 1,773,301 1,773,301 63,714        
Class B Ordinary Shares              
Ordinary shares, par value | $ / shares   $ 0.00005     0.00005    
Ordinary shares, shares authorized 826,389 826,389   826,389      
Ordinary shares, shares issued 826,389 826,389          
Ordinary shares, shares outstanding 826,389 826,389          
Class C Ordinary Shares              
Ordinary shares, par value | $ / shares   $ 0.00005     $ 0.00005    
Ordinary shares, shares authorized 203,111,416 203,111,416   203,111,416      
Ordinary shares, shares issued 4,265,286 4,265,286          
Ordinary shares, shares outstanding 4,265,286 4,265,286 4,265,286        
VIEs              
Accrued expenses and other current liabilities | ¥ ¥ 241,204     ¥ 223,298      
Deferred revenue, current | ¥ 1,765,085     1,325,954      
Payables to acquire buildings | ¥       180,390      
Deferred revenue, non-current | ¥ 1,520,940     ¥ 784,474      
Other non-current liabilities | ¥ ¥ 135