Core Viewpoint - The construction of the Changgan Railway's Hunan section has officially commenced with the successful installation of the first pile for the Huangxing Town Airport Bridge, marking a significant milestone for the project [1] Group 1: Project Overview - The Changgan Railway is part of the national "eight vertical and eight horizontal" high-speed railway network, specifically the Chongqing-Changsha-Xiamen corridor [1] - The total length of the railway is approximately 429.4 kilometers, with a designed speed of 350 kilometers per hour [1] - The railway will include 11 stations along its route [1]