There were two novels that met the requirements. They were "The Supreme Immortal Emperor in the City" and "The Sect Master's Wonderful City Life". The protagonist of " The Supreme Immortal Emperor in the City " returned to the city after cultivating for ten thousand years, while the protagonist of " The Sect Master's Wonderful City Life ", Du Feiyu, the twelfth sect master of the Extreme Dao Sect, discovered a change after cultivating for ten thousand years. I hope you like my recommendation.