铁证如山 tiě zhèng rú shān

DEFINITIONS

  1. irrefutable evidence

CHARACTERS

铁 tiě
HSK 3
iron; strong, solid, firm
证 zhèng
HSK 4
prove, confirm, verify; proof
如 rú
HSK 3
if, supposing; as if; like, as
山 shān
HSK 3
mountain, hill, peak