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Property and Equipment, Net (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
CNY (¥)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2020
USD ($)
Property and Equipment, Net          
Property plant and equipment, gross ¥ 1,435,641   ¥ 865,093 ¥ 552,008  
Less: accumulated depreciation (673,700)   (349,006) (157,110)  
Net book value 761,941   516,087 394,898 $ 116,773
Depreciation expenses 326,500 $ 50,040 191,784 99,714  
Leasehold improvements          
Property and Equipment, Net          
Property plant and equipment, gross 118,581   76,772 51,186  
Servers and computers          
Property and Equipment, Net          
Property plant and equipment, gross 1,286,310   765,110 481,695  
Others          
Property and Equipment, Net          
Property plant and equipment, gross ¥ 30,750   ¥ 23,211 ¥ 19,127