Xuanmen Celestial Master: He Comes from the World of Cultivating Immortals

It's a cool story about a master cultivator who pretends to be an immortal in a modern city, protects the destiny of the country, looks for true love, and finally returns to the immortal world. There is no harem, no wisdom, only the thrill of dimensionality reduction and the overwhelming love. There is room for a single female protagonist!