The article discusses the growing start-up scene in Beijing, China. Many ambitious Chinese entrepreneurs who studied or worked abroad are returning to China to start companies, bringing global experience and networks. Beijing is emerging as a major start-up hub to rival Silicon Valley, with support from the government and investors. The article profiles several Chinese start-ups founded by returnees, including a cloud computing platform and a location-based photo sharing app. It notes the advantages and challenges of founding companies in China compared to places like the United States.