jué​yīng

to forgive a minor offense

绝缨 絕纓 jué​yīng
to forgive a minor offense
To snap the tassel of a hat; based on an anecdote about King Zhuang of Chu, it refers to showing magnanimity and broad-mindedness by not exposing or punishing a small transgression.
informal party
(literary) describes a gathering between men and women where people are relaxed and do not strictly follow formal etiquette or grooming.
one who has committed an offense
A person who has behaved inappropriately or committed a minor error, referring to the official whose hat string was snapped by the queen in the allusion.