Why did Brother (Leslie Cheung) commit suicide?

Although no one can explain Leslie Cheung's death, it is an indisputable fact that he suffered from depression in the last stage of his life. In the previous six months, he made a horror film called Inner Senses. This film, starring him and Lin Jiaxin, tells the story of a psychiatrist who is deeply troubled by the suicide of his first girlfriend, and in the process of treating a female patient, he also causes illness and eventually leads to schizophrenia. It is said that Leslie Cheung was so involved in the role that he couldn't leave after filming that he was in a trance all day and even lost sleep for a long time. In his last album before his death, there was a "Nightdream", which truly explained his uncontrollable insomnia pain. After insomnia was cured for a long time, Leslie Cheung gradually accepted the concept of "hitting evil spirits" after shooting ghost films, and then adopted a series of practices such as western medicine, Chinese medicine and even watching geomantic omen to drive away the disease. It is said that his illness improved for a time, and he also took the film Stealing the Heart as a director. But soon, the pressure of work knocked him down again, and he fell into inescapable depression again.