铮铮铁骨

zhēngzhēngtiěgǔ

铮铮铁骨 — zhēngzhēngtiěgǔ

1. having a resolute, upright, and indomitable character; stern and honorable

   他为人铮铮铁骨，从不向不公低头。 tā wéi rén zhēngzhēngtiěgǔ cóng bù xiàng bùgōng dītóu — He is a man of iron principles and never bows to injustice.