Core Viewpoint - The development of rail transit is an effective way to address urban issues and build green and smart cities, with suggestions for integrated construction across various dimensions to enhance urban development [1][2]. Group 1: Rail Transit Development - The proposal includes piloting a "fast-slow train" model on long-distance lines like Metro Line 1 to optimize train frequency and adjust capacity during off-peak hours, thereby improving operational efficiency [1]. - There is a call for the integration of public transport-oriented urban space development to promote urban renewal and enhance the design of station-city integration [1]. - A push for a comprehensive smart upgrade of rail transit systems is suggested, including the establishment of a "smart brain" for Shenyang's urban rail transit to integrate passenger flow, equipment, and operational data for AI-driven scheduling and rapid fault diagnosis [1]. Group 2: Green Initiatives and Service Transformation - The promotion of photovoltaic canopies and energy recovery devices at metro stations is recommended, along with linking carbon credits to public transport and commercial consumption to encourage green travel [1]. - The transformation of metro services from "transportation operation" to "urban comprehensive services" is proposed, including upgrading the Shengjing Tong App to a multi-functional platform for travel, payments, cultural tourism, and government services [1]. - Development of a "Shenyang Metro Cultural Tourism Map" and the introduction of "Metro + Cultural Tourism" tickets are suggested to enhance cultural dissemination through rail transit [1]. Group 3: Urban Connectivity and Integration - The importance of rail transit in the construction of the Shenyang metropolitan area is emphasized, advocating for coordinated planning of rail lines under provincial guidance to enable "one card, one ticket" access [2]. - The establishment of a direct metro line between Shenyang and Fushun is proposed to facilitate a 30-minute commute between the two cities [2]. - The integration of four transportation networks (mainline rail, intercity rail, regional rail, and urban rail transit) is recommended, along with the creation of a data-sharing platform to enhance resource utilization [2].