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Intangible assets, net (Narrative) (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2017
CNY (¥)
Amortization of acquired intangible assets and land use right $ 103,099 ¥ 717,753 ¥ 69,095 ¥ 62,419
Finite-Lived Intangible Assets [Member]        
Amortization of acquired intangible assets and land use right   ¥ 669,657 ¥ 20,995 ¥ 14,510