Zhang Ren cultivated assiduously from childhood, endured a total of 1,750 tribulations, and finally attained enlightenment, becoming the Jade Emperor and gaining dominion over the Three Realms.
He thought that being an emperor would let him live a happy life, doing as he pleased. But the immortals controlled the government, while the Queen Mother ran the imperial harem. Zhang Ren was deeply frustrated and wanted to go to the mortal world to live freely for once. So, while the immortals were off guard, he descended to the mortal realm to be reborn.
The immortals sought the Queen Mother's counsel. She cast a divination and asked the heavens, which revealed: The Jade Emperor still has an unfulfilled wish. If he cannot satisfy it during this descent, he will never be able to return to the ranks of the immortals. This is a great calamity for the Heavenly Court. With no ruler in the Immortal Realm, the Three Realms will surely fall into chaos!