Tā zuò shì guāngmíng lěiluò, shì ge zhēnzhèng de dàzhàngfu.
He acts openly and honorably—he's a real man of character.
Tips
culture
Classical Confucian ideal from Mencius: 富贵不能淫，贫贱不能移，威武不能屈 (riches cannot corrupt him, poverty cannot move him, force cannot bend him). Carries weighty moral overtones, not just gender.
mistakes
In Japanese 大丈夫 (daijōbu) means 'it's okay / no problem' — a completely different sense. Don't import the Japanese meaning when speaking Chinese.
