Core Points - The completion of Guangdong's first 350 km/h high-speed rail "soundproof tunnel" marks a significant milestone in infrastructure development [1] - The Guangzhan high-speed rail project includes a total length of approximately 10.38 kilometers, featuring two major bridges [1] - The project aims to reduce noise pollution from high-speed trains, particularly in residential areas, by installing a 2.5 km circular sound barrier [1] - The high-speed rail is a crucial part of China's "eight vertical and eight horizontal" high-speed rail network, enhancing connectivity between the Guangdong-Hong Kong-Macao Greater Bay Area and other regions [1] - Once operational, the rail line will significantly shorten travel time, allowing for a 90-minute journey between Guangzhou and Zhanjiang [1]

Core Viewpoint - The Beijing-Harbin High-Speed Railway (京哈高铁) Beijing to Shenyang section will introduce 24 benchmark trains, allowing the Fuxing bullet trains to operate at a standard speed of 350 km/h regularly starting from July 1 [1][2] Group 1: Train Operations and Enhancements - The new train operation schedule will see the introduction of benchmark trains using the latest CR400BF intelligent Fuxing bullet trains, which will reduce travel times between certain cities [2] - Currently, there are 13 trains on the Beijing to Shenyang section with travel times under 3 hours, with the fastest train (G901) taking 2 hours and 44 minutes; this will increase to 22 trains under 3 hours, with the fastest (G901) reduced to 2 hours and 29 minutes, saving 15 minutes [2] - The introduction of benchmark trains will enhance high-speed rail transport capacity in Northeast China, with new services starting from Beijing West Station and additional stops in cities like Mudanjiang and Dandong [2] Group 2: Infrastructure and Safety Standards - The Beijing to Shenyang section has been designated as the first safety standard demonstration line in Northeast China, following comprehensive testing and upgrades to meet the 350 km/h operational standard [1] - The railway has undergone adaptive renovations and upgrades to its infrastructure, including tracks, bridges, tunnels, and signaling systems, ensuring compliance with high-speed operation requirements [1][3] Group 3: National Railway Adjustments - Starting July 1, the national railway will implement a new schedule, adding 236 passenger trains and 39 freight trains, including overnight sleeper trains on various routes [3][4] - The total number of scheduled passenger trains will reach 13,300, with expanded services such as "quiet carriages" and internet meal ordering available at 84 stations [4]