理直气壮 lǐ zhí qì zhuàng

ㄌㄧˇ ㄓˊ ㄑㄧˋ ㄓㄨㄤˋ

HSK 7-9core 10k

1to have the courage of one's convictions

2just and forceful

3in the right and self-confident (idiom); bold and confident with justice on one's side