Initially, Sun Wukong had promised Ye Zi that he would help revive his brother Ye Wu; it's just that he had never found the time to do so. Now having recently met with his teacher Master Zun and the final negotiations with various powers having ended, as well as the emergence of the undercover agent in the Netherworld World, it could be said that aside from the final battle with the Myriad Demons Country, Sun Wukong had no more worries. Especially after he had asked Master Zun if his mystic space could accommodate Old Sha and received an affirmative reply, Sun Wukong's heart was finally put at ease.