Leave them on their own devices2 )

Wu Jin looked at the man as if he had gone crazy. He wanted to say something but was stopped by Song Yan. The latter looked at him and smiled before saying, "Let's leave this matter alone. Since Mister Yun believes that there is no such thing as ghosts and grudge veins, I believe that there is no point in quibbling with him." 

Her words reminded him of his stubborn brother who refused to believe that there was something wrong with their sister despite sensing that something weird was going on in the house at that time. Though he agreed with what Song Yan said the foolishness of this man could lead to many deaths!

However, Song Yan did not seem worried. As a celestial master, she had warned Yun Yi and the rest if they did not believe her then there was nothing that she could do. It was better to leave them to their own devices and have them learn their lesson.