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Land use rights, net (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2020
USD ($)
Land use rights, net        
Land use rights ¥ 11,786,977,000 ¥ 11,380,221,000    
Less: accumulated amortization (662,064,000) (488,479,000)    
Net book value 11,124,913,000 10,891,742,000   $ 1,704,968
Amortization expenses 228,844,000 ¥ 222,143,000 ¥ 181,101,000  
Amortization expenses related to the land use rights for future periods        
2021 237,578,000      
2022 237,578,000      
2023 237,578,000      
2024 237,578,000      
2025 237,578,000      
2026 and thereafter ¥ 9,937,023,000