new word
Basic explanation
Foreign party: the appearance is angular and rigid; Inner ring: no edges and corners inside, smooth. Refers to a person who is upright in appearance but smooth in heart.
tidy
"The History of the Later Han Dynasty Biography to the Cloud": "The case is greedy and evil, and the insider (circle) is a traitor and harms people."
Approximate antonym
The outer circle is inside-gentle in appearance but stern in heart