There used to be a movie about the failure of several college students to exchange blood for their classmates. As a result, they destroyed bodies and buried people, and finally turned into zombies to get revenge. What movie is that? It is an early Hong Kong horror series "The Soul Experiment of the Arabian Nights", played by Yin Tianzhao. They gave everyone blood and killed him, so they buried him in the field next to the school. However, since then, grass has never grown on that land. Later, they all died, only one was alive. I saw it in the third grade. It was very beautiful and impressive.