One Day I Remembered the Big Password

The protagonist, Xie Zhiran, was plotted to die as the best person in the world in his previous life. After his reincarnation, he lost his memory. Later, he encountered bits and pieces from his previous life and a series of stories about his friends and enemies from his previous life. During his exploration of the world, he discovered that his death in his previous life and his reincarnation were planned by Xie Zhiran, with the purpose of questioning himself and finding out more about the world.