After deliberations between Du You and Shaliya, the final decision was made to begin tunneling at the weakest part of the mountain range. At this location, there was a mountain range fork. To improve transportation, Du You planned to construct two tunnels here.
Between the two tunnels, a small military town would be established, which would later become a vital hub for communication with the opposite side.
During the construction of the tunnels, Shaliya would gather the materials needed to build Icicle Towers in full force, aiming to build a large number of them all at once. This way, they could occupy the opposite side before the enemy could react.
Speaking of which, Du You would not have been able to construct these tunnels if they weren't being built within his own territory. Without an abundance of earth attribute mages or other alchemical products, merely relying on ordinary citizens to dig these tunnels would have been year-round large-scale projects.