C973 White Feather's Descendency
The reason why Bai Yu went to rescue Jin Muyan was to deal a certain degree of damage and purge the bronze tree while replenishing his Ghost God's power.
This was because Bai Yu had already gone to the eleventh region to inspect and received a dimensional travel quest, which was to exterminate the bronze tree.
The mission reward was 20% of the Dimension Wall's power