That's understandable.
Ke Wuxin now holds the mantle of an Immortal Slaying Physique successor and the title of the Imperial Academy's head's closed-door disciple, along with numerous honors and accolades, defying the heavens. Why would he want to reveal that years ago he was suppressed by someone to the point of resembling a grandson, and that he only obtained the title of Son of the Emperor because Su Chen was trapped in the Deceptive Realm Battlefield? For Ke Wuxin, this is a blemish—a stain he absolutely does not want others to know about, including Xu Wu, who is close to him.
However.
The situation is different for Ke Ying.
Xu Wu doesn't know Su Chen, but Ke Ying does.
Ke Ying didn't learn about Su Chen from her brother Ke Wuxin. She herself hails from Great Luo Heaven, from the Hidden World Clans, the Ke Family.
She is well aware of Su Chen's fame in Great Luo Heaven, having witnessed his countless miracles.
She has even seen Su Chen's portrait multiple times.
