C4445 Demonic Dragon Westward
Riding a airship to fly across the mountain during winter was a seemingly impossible mission. The temperature of the bitter cold weather in the mountain during winter could be as low as -30-40 degrees Celsius, and there was a seven day gale!
Due to the complex terrain, there were a lot of turbulence in the air. Sometimes, a gust of wind would turn into a small vortex when blocked by a cliff