Given how powerful the Kingdom of Dawn was, the items they put on the market couldn't be ordinary or worthless because that would be a disgrace to the Human race and the kingdom.
If the frontier trade failed, the reputation of the Kingdom of Dawn and the Lord of Dawn would plummet and even become a laughingstock.
The prestige that the Kingdom of Dawn had built up with great difficulty would vanish in an instant.
"Don't underestimate the Human race! It was said that there were many top powerhouses in the Human race. However, they could only be sealed in special grotto-heaven planes due to the restrictions of heaven and earth. Otherwise, the entire continent would not be in such a state. The Human race's foundation isn't as shallow as you think. In fact, it's even deeper than you think. Their true power lies within the sealed grotto-heaven planes."
The lady seemed to know a lot of secrets, so she said with deep meaning.