The Divine Emperor was so enthusiastic because he discovered a few key pieces of information.
Firstly, Su Xiao didn't put the "Ring of the Holy Dirge" on display at the stall, and secondly, there were no members from other large adventure groups around, which means the email was an exclusive message, sent only to their God Emperor Adventure Group.
Undoubtedly, this was a gesture of great respect, and the Divine Emperor certainly wouldn't ruin such a trading atmosphere.
Actually, the Divine Emperor was overthinking. Su Xiao only notified the Divine Emperor because he had traded with him a few times, and from those interactions, it was clear that the Divine Emperor was very earnest in trading.
