铁石心肠

tiěshíxīncháng

铁石心肠 — tiěshíxīncháng

1. to have a heart of stone; hard-hearted; unfeeling

   他铁石心肠，看到孩子受苦也不动容。 tā tiěshíxīncháng kàndào háizi shòukǔ yě bùdòng róng — He has a heart of stone; he doesn't show any emotion even when he sees children suffering.