Group 1 - The integration of the Shenzhen metropolitan area is rapidly advancing, with significant progress in multiple rail transit lines connecting Shenzhen, Dongguan, and Huizhou, forming a "one-hour traffic circle" [1] - The successful completion of the shield tunnel for the Shenzhen-Huizhou intercity line marks a completion rate of over 85%, laying a solid foundation for future connectivity [1] - Shenzhen is promoting three cross-city metro projects that will enhance rail connectivity between Shenzhen and Dongguan, facilitating access to key areas [1] Group 2 - The "Shenzhen-adjacent areas" in Dongguan and Huizhou have become focal points for Shenzhen investors, with improved transportation options enhancing the convenience of living in dual-city environments [2] - The rapid development of rail transit infrastructure is expected to expand the influence of major cities like Guangzhou and Shenzhen, extending public services and economic activities to surrounding areas [2] - The extension of rail lines is anticipated to reshape industrial layouts, with a focus on transportation hubs, creating a "Shenzhen R&D + Dongguan trial production" closed loop [2]