Group 1 - The construction of the railway renovation project from Fuyu to Nenjiang to Jiagedaqi in Heilongjiang Province has officially commenced as part of the national "14th Five-Year" railway development plan [1] - The Fuyu-Jiagedaqi railway is a crucial transportation link for the Daxing'anling region, spanning across Heilongjiang Province and Inner Mongolia [1] - The renovation will reduce the travel time from Jiagedaqi to Harbin from the current 9 hours and 43 minutes to approximately 6 hours and 30 minutes, with an annual freight capacity increase to 50 million tons [5] Group 2 - The Dongying Yellow River Public-Rail Bridge, the largest span public-rail bridge under construction in the Yellow River basin, has successfully completed the main tower construction [5][8] - The bridge, part of the Tianjin-Weifang high-speed railway, features a total length of 2,230.4 meters and a main span of 600 meters, with the main tower reaching a height of 203.6 meters, making it the tallest public-rail bridge tower over the Yellow River [8] - Upon completion, the Tianjin-Weifang high-speed railway will serve as a significant north-south high-speed artery through the Shandong Peninsula, reducing travel times to cities like Jinan and Qingdao to under one hour [10]