Idioms ending with zhizi

Idioms that end with the word " Zhu"

The fourth character is the idiom " Zhu", the last character is the four-character idiom ending with " Zhu" and its explanation:

Pottery melting drum casting - a metaphor for beneficial influence on people's thoughts and characters.

Steel poured into iron - a metaphor for perseverance and perseverance.

Iron is struck with copper and cast with copper. Described as very solid.

Copper and iron - described as very solid and stable.

Made of copper and iron - describes a very strong physique.