Ning Yihai was taken aback by Su Han's words, and the other disciples of One Slash Palace were also momentarily stunned.
Ning Yihai was able to intervene so promptly because he had already been present, just not revealing himself. Naturally, he heard everything Nan Hong said before.
However, Ning Yihai did not understand what Su Han meant, nor did he know which exact words of "Nan Hong's previous words" Su Han referred to.
So, the first reason for their surprise was this, and the second was Su Han's attitude.
This was also the reason all the disciples of One Slash Palace were stunned.
Though Ning Yihai was also a disciple of One Slash Palace, his cultivation base was truly that of a strong Dragon Emperor Realm, far surpassing Nan Hong. He couldn't be viewed in the same light as an ordinary disciple of One Slash Palace. Such a Dragon Emperor would stand up to make Su Han stop; both the disciples of One Slash Palace and Ning Yihai himself thought Su Han should give him face.