A staff member tests the speed with a Huawei 5G mobile phone at Huawei 5G Innovation and Experience Center in London, Britain, on Jan. 28, 2020. The British government on Tuesday approved a restricted role for Huawei in building the country's 5G network. Huawei, the Shenzhen-based networking and telecommunications equipment and services supplier, said that it is reassured by the British government's confirmation that it can continue working with the customers to keep the 5G roll-out on track. (Xinhua/Han Yan)