Later generations joked that what is Su Shi's calligraphy?

Later generations jokingly called Su Shi's calligraphy a stone-broken toad.

Su Huang's calligraphy was close to the modern popular calligraphy style at that time, or was founded in the Song Dynasty.

Su Huang and his wife both gave each other a number. One is that a toad was killed by a stone. One is: a snake hanging from the treetop.