What do you mean, a thousand pieces of jade turn into jade and a hundred pieces of iron turn into steel?

The meaning of this sentence is as follows:

As long as people have perseverance and perseverance, they can become real "steel", that is to say, they become very strong after long-term hard exercise.

The origin of a hundred trials into steel is: Wu Chenlin, Han Dynasty: "A makes Donghu quegong, and a hundred trials are refined." Armor metaphor is very powerful after long-term casting. Tempered steel is synonymous with tempered, indomitable and battle-hardened