Fantasy Adventure: Falling into a Cave and Picking up Magical Secrets

Modern City, University Cultivation: After Five Years of Cultivating in a Cave, I Became Invincible When I Came Down the Mountain.

I want to read a book like "I practiced immortality in a cave for five years and became invincible when I came down the mountain". Looking for modern cities, university cultivation, and high-quality novels like "Five Years of Cultivation in the Cave, and I'm Invincible when I Go Down the Mountain"