Since the City was the one who was paying his bills Yoze couldn't help but side with the city and help their cause. So after getting the letter, Yoze stopped his training and made preparations for any possibility that could happen during his trip.
"The Scholar Examination should be starting in 2 months. So for me to receive a letter so early means that the place I'm going to be traveling to is quite far."
As Yoze packed his things he took a bunch of dried food with him to satisfy his large food requirements if, at any point during the trip, he couldn't eat the food that his guides brought along.
He also grabbed his sword and his armor as he planned to focus on training his Armored Swordsman Slash and Shuffle along the way. Yoze didn't plan on training Iron Skin since he couldn't be sure he would be able to have a large source of boiling water throughout the trip.