Condensed Financial Information of the Parent Company (Tables)
12 Months Ended
Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]  
Condensed Balance Sheets

CONDENSED BALANCE SHEETS

 

     December 31,  
     2016      2017  
     RMB      RMB      US$  

ASSETS

        

Current assets:

        

Cash and cash equivalents

     57,505        31,781        4,885  

Short-term investments

     486,341        699,159        107,459  

Prepaid expenses and other current assets

     26,113        23,315        3,583  
  

 

 

    

 

 

    

 

 

 

Total current assets

     569,959        754,255        115,927  

Non-current assets:

        

Other non-current assets

     5,936        3,816        587  

Investment in subsidiaries and VIEs

     5,807,841        7,798,858        1,198,663  
  

 

 

    

 

 

    

 

 

 

Total non-current assets

     5,813,777        7,802,674        1,199,250  
  

 

 

    

 

 

    

 

 

 

Total assets

     6,383,736        8,556,929        1,315,177  
  

 

 

    

 

 

    

 

 

 

LIABILITIES AND SHAREHOLDERS’ EQUITY

Current liabilities:

        

Accrued expenses and other payables

     20,660        6,932        1,065  

Dividend payable

     —          595,779        91,570  

Due to subsidiaries

     2,672        2,581        397  
  

 

 

    

 

 

    

 

 

 

Total current liabilities

     23,332        605,292        93,032  
  

 

 

    

 

 

    

 

 

 

Total liabilities

     23,332        605,292        93,032  
  

 

 

    

 

 

    

 

 

 

Commitments and Contingencies

        

Shareholders’ equity:

        

Ordinary shares (par value of US$0.01 per share; 100,000,000,000 (including 99,931,211,060 Class A and 68,788,940 Class B ) shares authorized; 115,297,224 and 117,140,856 shares issued and outstanding, all comprised of Class A, as of December 31, 2016 and 2017, respectively)

     7,784        7,909        1,216  

Additional paid-in capital

     3,006,152        3,246,475        498,974  

Accumulated other comprehensive income

     125,009        69,954        10,752  

Retained earnings

     3,221,459        4,627,299        711,203  
  

 

 

    

 

 

    

 

 

 

Total shareholders’ equity

     6,360,404        7,951,637        1,222,145  
  

 

 

    

 

 

    

 

 

 

Total liabilities and shareholders’ equity

     6,383,736        8,556,929        1,315,177  
  

 

 

    

 

 

    

 

 

 
Condensed Statements of Comprehensive Income

CONDENSED STATEMENTS OF COMPREHENSIVE INCOME

 

     Year ended December 31,  
     2015     2016     2017  
     RMB     RMB     RMB     US$  
Operating expenses:         

General and administrative expenses

     (24,235     (20,533     (13,334     (2,049
  

 

 

   

 

 

   

 

 

   

 

 

 
Operating losses      (24,235     (20,533     (13,334     (2,049

Interest income

     11,526       7,492       13,441       2,066  

Share of income of subsidiaries and VIEs

     1,003,358       1,240,955       2,001,512       307,625  
  

 

 

   

 

 

   

 

 

   

 

 

 
Income before income taxes      990,649       1,227,914       2,001,619       307,642  

Income tax expense

     —       —       —       —  
  

 

 

   

 

 

   

 

 

   

 

 

 
Net income      990,649       1,227,914       2,001,619       307,642  
  

 

 

   

 

 

   

 

 

   

 

 

 
Other comprehensive income/(loss), net of tax of nil         

Foreign currency translation adjustments

     56,821       62,256       (55,055     (8,462
  

 

 

   

 

 

   

 

 

   

 

 

 
Comprehensive income      1,047,470       1,290,170       1,946,564       299,180  
  

 

 

   

 

 

   

 

 

   

 

 

 
Condensed Statements of Cash Flows

CONDENSED STATEMENTS OF CASH FLOWS

 

     Year ended December 31,  
     2015     2016     2017  
     RMB     RMB     RMB     US$  

Net cash used in operating activities

     (2,017     (23,846     (8,303     (1,276
  

 

 

   

 

 

   

 

 

   

 

 

 

Net cash used in investing activities

     (132,976     (86,743     (77,005     (11,835
  

 

 

   

 

 

   

 

 

   

 

 

 

Net cash generated from financing activities

     30,200       25,420       61,070       9,386  
  

 

 

   

 

 

   

 

 

   

 

 

 

Effect of exchange rate changes on cash and cash equivalents

     7,569       5,864       (1,486     (228
  

 

 

   

 

 

   

 

 

   

 

 

 

Net decrease in cash and cash equivalents

     (97,224     (79,305     (25,724     (3,953

Cash and cash equivalents at beginning of year

     234,034       136,810       57,505       8,838  
  

 

 

   

 

 

   

 

 

   

 

 

 

Cash and cash equivalents at end of year

     136,810       57,505       31,781       4,885