It is understood that when Xu Beihong painted the cover of the Stone Tablet, he adopted a combination of ink painting and painting. He first outlined the whole pattern with ink and then painted it with pigment to make it more vivid and three-dimensional.
Specifically, the cover of the stone cup depicts a huge turtle with two little turtles playing on its back. The whole pattern composition is concise and lively, which implies the spirit of "connecting the past with the future and carrying forward the future". At the same time, Xu Beihong used the "freehand brushwork" technique commonly used in traditional ink painting to portray the images of tortoise shells and small turtles vividly, which was very artistic.
In a word, the cover of Stone Tablet is a work with great artistic value and cultural connotation, which occupies an important position in the history of China fine arts.