Web pictures
At the end of the Tang Dynasty, there was a teenager named Sang Weihan, who was short in stature and ugly in appearance, but he studied hard and was determined to do a career.
Comic strips
The adult Sang Weihan took the entrance examination, because "Sang" and "mourning" were homophonous, and the chief examiner always brushed him off first. His friend advised him to find another way, but Sang Weihan refused, and also cast an iron stone, saying fiercely: "Unless you wear the iron stone, you will never give up." He persevered and finally passed the entrance examination.
Sunvihan
Grind through the iron stone, grind through the iron casting platform. Describe it as determined and persistent.
Iron Stone