The Greatest Man Alive Is the Shopkeeper, While I Slacken Off Every Day

Now and then, a strange light flashes in the depths of the firmament, appearing once every ten thousand years. No one knows where it comes from, and people take it as an auspicious omen. Tao Che transmigrates to this world. Huh! There are literary arts and cultivation here, so it should be a breeze. Otherwise, what would all those years of tuition have been for? But then... he actually becomes the number one cultivator in the Dao!