Valuable.

1. Artistic achievement: Xue Zhanglin is a calligrapher and painter with high artistic attainments. He has unique style and skills in calligraphy and painting. His works show talent and creativity and are recognized and appreciated by professionals and art lovers.

2. Art market recognition: Xue Zhanglin’s works have a certain degree of popularity and recognition in the art market. Works sold at high prices at auctions or collected by art collectors and institutions will increase the value of the work.

3. Scarcity: The number of Xue Zhanglin’s calligraphy and painting works is limited, the works are created by hand, and each work is unique. Scarcity can increase the rarity and market demand of a work, thereby increasing its value.