release the righteousness trend: go quickly; Emu: Wild duck. Run like ducks in groups. It is a derogatory metaphor for groups of people rushing to chase improper things.

You can write poetry when you are out of the office. Scholars flock to you, and the seats are always full. -Biography of Xiao Ruxun in Ming Dynasty

Crucian Carp Crossing the River

The detailed explanation of this idiom is: When the Western Jin Dynasty perished, the Central Plains was in chaos, and celebrities from the Central Plains came to Jiangnan in succession. Hence the poem "There are more celebrities crossing the river than crucian carp". Later used to describe many people who follow the fashion.