Time travel, quick transmigration

Once, the boy she liked asked, "Do you believe in parallel universes?" At that time, Shi Yan didn't believe it. So, do you also believe that parallel universes truly exist? This is the story of a girl named Shi Yan and a little dumpling named 0804, tasked by the main god, who travel together in parallel universes to change the fates of the deceased, dispel their resentment, and allow them to be reborn, willingly letting go of their obsessions. This is their journey through time, and also a journey through time for everyone who enters this story. Main characters (Yang Guifei, Empress Zhou Ehuang, Su Xiaoxiao, a songstress from the Southern Qi Dynasty of the Northern and Southern Dynasties, Empress Xiaojing, Consort Wang...) This story...