Who is the monster of Luzhou carp essence?

What you want to ask is who is the monster who took the carp essence. Master Yin and Yang took carp essence from the fox.

In the story that the teacher of Yin and Yang fell in love with the beauty of carp, a girl disappeared recently. The fox likes all beautiful things, and the river boy turns to the unfathomable in order to get rid of the fox.

But the fox was well disguised and unfathomable. Then the carp essence disappeared, and the river boy turned to inscrutable for help. Eight hundred monks divined the location of carp essence through its scales and found that it was taken away by the fox.