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Intangible Asset -Estimated annual amortization expense (Details) - Dec. 31, 2019
¥ in Thousands, $ in Thousands
USD ($)
CNY (¥)
Intangible Asset    
2020 $ 90,384 ¥ 629,233
2021 90,137 627,514
2022 90,137 627,514
2023 $ 15,805 ¥ 110,031