He's broad-minded and never fusses over trivial matters.
Tips
memory
Literally 'chest lapel' - the front of the jacket over the heart. Classical Chinese imagined the chest as the seat of feelings and ambition, so 胸襟 became a metaphor for what a person 'carries inside' - their breadth of mind.
usage
Common collocations: 胸襟开阔 broad-minded, 胸襟狭窄 narrow-minded, 远大的胸襟 lofty aspirations.
