Brother Xuanmen went down the mountain. Who is Master Lu?

Lu Shizhen. He is a character in the novel "Metaphysics Brother Perception of the World after Going Down the Mountain". The plot of the novel is that the big lady that Su Jiagang got back is a disaster. Later, I heard that Miss Su's family had offended the formidable third master of Yuan's family. Everyone is waiting for Su Jin to finish. They waited and waited ... The news came that Su Jin and Master Yuan were engaged. Third Master openly said in the circle: My wife is too young to be sensible, so don't bully her.