On August 1, 2025, in the section from Huchao Station to Machang Station on the Guizhou section of the Shanghai Kunming Railway, four large-scale road maintenance machinery covering the operation roared loudly. More than 100 operators from China Railway Chengdu Group Co., Ltd. carried out track bed "disease" rectification and compaction operations on the main line, and the 2025 major overhaul and centralized repair construction of the Guizhou section of the Shanghai Kunming Railway was fully launched. It is reported that more than 800 construction vehicles and auxiliary vehicles will be invested in this centralized repair, and the line equipment will be deeply renovated. The core goal is to improve the stability of the equipment and ensure the safe and smooth operation of trains during the summer transportation period. (New Society)