This is the technique of the Saintess, also known as magic, which has healing effects.
Her power is not limited to martial strength; she has many ways to cure and save people. That's why Li Yifei following her is better than following those rough brothers, which is also one reason why Third Brother Liu Ming took a few brothers and left without saying anything.
Of course, the most important thing is that Liu Ming believes the Saintess poses no threat to his Tenth Brother. He even already sensed the Saintess's feelings for Li Yifei; otherwise, she wouldn't have jumped into the sea fearlessly in such a dangerous situation.
Generally, not even couples can accomplish this task.
So he thinks there is an emotional connection between the Saintess and Li Yifei, meaning there's no need to worry. The Saintess wouldn't make a move to kill Li Yifei when he's this vulnerable.
