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Revenue from Contracts with Customers - Summary of Contract Balances (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2020
CNY (¥)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
CNY (¥)
Disclosure of contract assets liabilities [abstract]          
Trade receivables (Note 15) ¥ 289,048 $ 44,666 ¥ 737,067    
Capitalized contract cost 127,704 19,734 136,457 $ 21,086 ¥ 44,434
Contract liabilities (Note 24) ¥ 935,462 $ 144,556 ¥ 436,622