Originally, Ye Wudao had not realized that Li Junshuo was skilled in martial arts, including the time at the entrance of the auction, where he had no inklings of Li's abilities. However, to his surprise, Li Junshuo turned out to be a master, and he had concealed it so well that had Ye Wudao not provoked him just now, prompting that particular hand gesture from Li, he would never have had the chance to discover his secret.
Why was Li Junshuo concealing his martial arts abilities? What was his purpose in approaching Song Yuhan? Ye Wudao was reminded of Sheng Tianji's issue, as the female assassin that had come after him last time was likely sent by Sheng Tianji, even though she had not been successful.
"Daughter, he is..."
Lady Song, while not the type to despise the poor and adore the rich, clearly saw that he was no match for Li Junshuo. If this guy were to pursue her daughter, she would definitely not approve.