As for Shan Jiu, he was originally wandering in the Penglai Sea with Tao Qian and Mosquito Daoist Xue Ming.
Until one night, this fellow suddenly had a moment of insight, the wild leek roots surged, reaching the heavens and the earth, and he only had time to shout to Tao Qian: "Hahaha... Shan Jiu has attained the Dao today, no longer a wild leek, but a celestial leek. To the great folks of Wild Man Mountain, Shan Jiu is returning to repay the grudge of driving me away."
After saying that, Shan Jiu had already transformed into a strange rainbow that nearly illuminated half the East Sea, casually breaking through the barrier of the Longevity Realm and heading to the Outer Realm.
An old question from back then had been answered.
The territory with wonderful scenery, called [Wild Man Mountain], was indeed in the Outer Realm.
...
"It's also good that they're not here, having others around would inevitably cause some hesitation in actions."
