Modern Chinese Literature

1. In Lu Xun’s “Preface to Call to Arms,” he talked about a slide viewing incident when he was a medical student in Japan. He wrote that “this slide convinced me that medical science was not so important after all.” Why? What’s Lu Xun’s account for it?
2. In the short story, “Madman’s Diary,” what is the illness that the madman suffers from? What are some of his symptoms?