Core Viewpoint - The urban rail transit ranking is expected to change this year, with Chengdu's rail transit network set to exceed 700 kilometers due to multiple new line openings, enhancing connectivity and supporting economic development [1][3][4]. Summary by Sections Chengdu's Rail Transit Expansion - Chengdu's rail transit group announced the full launch of trial operations for several new lines, marking a significant step towards initial operations [1]. - The total operational mileage of Chengdu's rail transit is projected to surpass 700 kilometers this year, with the addition of four new lines totaling 87.5 kilometers [3][4]. Comparison with Other Cities - Other major cities like Guangzhou, Chongqing, and Nanjing are also set to open new lines, potentially altering the rankings in urban rail transit mileage [6][8]. - Guangzhou is expected to maintain its third position with a projected operational mileage of 700 kilometers after the opening of new lines [6]. Future Projections - The fifth phase of Chengdu's rail transit planning has been approved for 2024, with new lines expected to be announced soon [4]. - The number of cities with operational rail transit exceeding 500 kilometers will increase to nine, with Nanjing expected to surpass Chongqing in the rankings [6][8]. Competitive Landscape - The competition between cities like Xi'an and Zhengzhou is intensifying, with both cities aiming to improve their rankings through new line openings [8].

Core Insights - The urban rail transit landscape in China is set to change significantly, with Chengdu's rail network expected to exceed 700 kilometers in 2023, marking a substantial increase in operational mileage [1][2][4] Group 1: Chengdu's Rail Expansion - Chengdu's rail transit group announced the commencement of trial operations for multiple new lines, including the 10th, 17th, and 30th lines, contributing to a total operational mileage expected to surpass 700 kilometers this year [1][2] - The Chengdu government aims to strengthen transportation infrastructure, with plans to open four new lines totaling 87.5 kilometers in length [2] - The completion of these new lines will enhance connectivity between various districts and support economic development in the region [3] Group 2: National Rail Transit Rankings - The number of cities in China with urban rail transit exceeding 500 kilometers will increase to nine, with Chengdu and Guangzhou both set to surpass this milestone [4][6] - Guangzhou's rail network is projected to reach 693.9 kilometers in 2024, maintaining its position as the third-largest rail network in the country [4][5] - The competition among cities like Nanjing, Chongqing, Xi'an, and Zhengzhou is intensifying, with Nanjing expected to surpass Chongqing in operational mileage, moving to the eighth position [5][6]