Subject + 见义勇为
The four-character idiom 见义勇为 (jiànyìyǒngwéi) means 'to act bravely for a just cause' or 'to do what is right courageously.' It describes someone who steps forward to help others or fight injustice without hesitation. This is a classical Chinese expression often used to praise heroic behavior.
他见义勇为,跳进河里救了落水的孩子。
Tā jiàn yì yǒng wéi, tiào jìn hé lǐ jiù le luò shuǐ de háizi.
He acted bravely for a just cause and jumped into the river to save the drowning child.
社会需要更多见义勇为的人。
Shèhuì xūyào gèng duō jiàn yì yǒng wéi de rén.
Society needs more people who act bravely for just causes.
警察表扬了那位见义勇为的年轻人。
Jǐngchá biǎoyáng le nà wèi jiàn yì yǒng wéi de niánqīng rén.
The police commended the young person who acted bravely for a just cause.