Middlemen make a profit from the price difference

In the Qi family villa, the heads of the other three families were sitting inside. When Zheng Yuankun saw Qi Heng standing nearby, he thought of his daughter who was beaten to death. He couldn't help but get angry and said, "What are you doing here? Get out of here!" Qi Heng said with a bitter face, "Father-in-law, I am also very sad about Lin'er's death, but this matter really has nothing to do with me. It was that female police officer who beat her to death!" "Isn't it because of you?" Because...