Reborn with Eight Hundred Years of Cultivation

I'm a new writer, and the story takes a little while to get going. I hope you'll bear with me.

After transmigrating to a fantasy world, Qin You cultivated for eight hundred years and reached an unrivaled level, then perished in body and spirit.

But when he woke up, he was reborn in the modern world. So much time had passed that his memories had grown hazy. With the help of his beautiful roommate, Li Siyue, he slowly began to recover them, step by step...