China's mobile economy has rapidly evolved into one of the most advanced and integrated digital ecosystems in the world. This research investigates the core factors that have contributed to its development, including technological innovation, shifting consumer behaviour, infrastructure investments and supportive government policies. The study aims to evaluate the relative influence of these factors using a mixed-methods approach that includes case studies (Tencent, Alibaba, ByteDance) and statistical analysis of macroeconomic indicators. Findings reveal that mobile user growth and digital infrastructure expansion are among the most significant contributors to mobile economic performance. Chinese government's active involvement in shaping the digital environment, along with consumers' high adoption rates of mobile services, form a unique foundation for innovation and economic expansion. Cases analysis further shows that major tech firms are key drivers of ecosystem integration, localized services, and data-centric growth strategies.