C517 When Ice Is Frozen It Is Hard When Water Is Frozen It Is Soft!

According to the route Tang Ruloong told him, Ye Fann stopped and walked as he collected maps along the way.

This was the only problem in this era. Without the aid of navigation tools, one wouldn't even be able to find a complete map.

Those detailed maps of the surrounding landscapes that were recorded within hundreds of kilometers could all be hidden away as treasures