It wasn't Lin Jin's first time traveling so far from home. His last trip to Daluo Temple, which was thousands of miles away from Jade Dragon Kingdom, took three days on eagleback.
Heavenly Spiral Kingdom was situated in the heart of United Continent so it was even further away compared to Daluo Temple. Even with the eagle, they would need about five days to get there.
Lin Jin wasn't in a hurry so there was no need to force themselves to travel at night. He also hasn't been to the hinterlands of United Continent so it would be a waste not to enjoy the scenery as he traveled.
To Old Mo, he considered this an opportunity.
During their trip, he gathered the courage to ask Lin Jin about the study of beast appraising. Although Lin Jin was aware of Old Mo's intentions, he was bored too so he decided to initiate a conversation.