I, Xinsu, Refine Gu in the Supreme Immortal Aperture

Chen Kuang discovers that his consciousness can enter a world called the Supreme Immortal Aperture every day, so he gets sent to a psychiatric hospital.

There, he meets the doctor Fang Didianduan, the author Li Xiaohei, the kind Xiao Xing, the murderer You Ying, the gambling king Liu Yang, and Meng Qiujia, another transmigrator like him...

Chen Kuang has always thought it was an illness, so he follows the doctor's orders and tries not to do anything violent. He just keeps refining Gu in the Supreme Immortal Aperture, until the doctor and his mentor tell him together that his illness can be treated...

Good news: I've been cured.

Bad news: I haven't been completely cured...