Combination photo taken in a branch of China Telecom in Beijing on Oct. 31, 2019 shows the comparison of uploading speed (L) and downloading speed between 4G service (the left device in each picture) and 5G service. Chinese major telecom operators announced Thursday the launch of commercial 5G applications during the opening ceremony of PT Expo China 2019 in Beijing. (Xinhua/Shen Bohan)