The evidence left by Long Fei was precisely the Seven-Colored Peacock Feather of the Peacock Demon King, one of the Four Great Demon Kings in the Valley of Myriad Demons in Jingzhou Prefecture of the Great Xia Country.
In Celestial Mystery City, the other three of the Four Great Demon Kings, the Dragon-Scaled Elephant King, the Golden Lion King, and the Single-Horned Rhino King, were all captured.
On that day, Long Fei had devised a plan to let Chu Feng and others release them.
To express their gratitude, the Four Great Demon Kings each gave him a token, promising to repay Long Fei's favor when the opportunity arose.
They were beings with integrity, not wanting to owe anyone anything.
The Peacock Demon King left this Peacock Feather for Long Fei to use as evidence in the valley.
The Xiao Family disciples ran to the valley to check, not believing his words.
Someone indeed found the Peacock Feather on a hillside.
