Dual Transmigration: The Eerie Modern World and Uncle Nine's World

[Dual Transmigration] [Eerie] [Uncle Nine] Lin Yu has just finished his college entrance exams when he receives the news that his grandfather has passed away. Overcome with grief, he falls asleep on his way to the high-speed rail station and unexpectedly transmigrates back to his first year of middle school. But this world seems different from the one he remembers: ghosts and monsters have existed since ancient times, rising and falling with each dynasty. Fortunately, Lin Yu gains the ability to transmigrate to Uncle Nine's world. See how Lin Yu protects his family and friends in this life and makes up for the regrets of his childhood.

Uncle Nine: “Wonderful! You really are a disciple of mine, Lin Jiuying. Your talent is truly rare!”

Qiusheng: “Brother Lin Yu, can that human-ghost unity you mentioned really be achieved?”

Wencai: “Hehe, Junior Brother, what was that method you mentioned for cultivating while slacking off?”

Lin Yu's parents: “Don't worry, son. Your mom and dad have got your back.”

Grandfather: “With a grandson like him, our family will prosper. Our family will prosper! I can die without regrets!”

…I'm not good at writing introductions, so please read the story itself.