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Inventories - Summary of Inventories (Detail) - CNY (¥)
¥ in Millions
Dec. 31, 2020
Dec. 31, 2019
Classes of current inventories [abstract]    
Handsets and other terminals ¥ 6,262 ¥ 5,205
Other consumables 1,782 2,133
Inventories ¥ 8,044 ¥ 7,338