China has reportedly begun building large-scale trial networks based on its home-grown third-generation (3G) mobile telephone standard. Construction of the networks in Shanghai and other cities is a measure of China’s determination to create a central role for the TD-SCDMA standard as part of its long-awaited rollout of 3G services. The Shanghai trial involves two core networks and 16 “base stations” that cover commercial districts, development zones and residential neighbourhoods.