Recently, the preliminary design and consulting for the project—— Ultra-Long Tunnel Construction in the Extremely Cold and High-Altitude Region of Ganzi Prefecture —— undertaken by JSTI Group entered into the key phase. In order for the smooth development of the project, the improvement of technology, and to provide the best solution, the project team specially organized in-depth research and exchanges on the applicability of TBM equipment for ultra-long tunnel construction in the extremely cold and high-altitude region.