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Goodwill - Additional Information (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2013
CNY (¥)
Dec. 31, 2012
CNY (¥)
Dec. 31, 2019
USD ($)
Jul. 17, 2018
CNY (¥)
Goodwill [Line Items]            
Goodwill, acquired   ¥ 612,239        
Goodwill ¥ 3,888,346 3,888,346     $ 558,526 ¥ 588,857
Goodwill, impairment loss ¥ 0 ¥ 0        
Shanghai Zhong Yuan Network Co., Ltd. (“Shanghai Zhong Yuan”)            
Goodwill [Line Items]            
Goodwill, acquired     ¥ 1,800,750      
Baidu            
Goodwill [Line Items]            
Goodwill push down accounting adjustments       ¥ 1,475,357