This is worthless, isn't it?

This inscription is the ink of a man who calls himself a mountain stone. The price is not clear, and the information available is as follows:

Shanshi, whose real name is Sun Decai. Born in February 1936, his pen name is Shanshi, and he is called "Shanshi Old Man", and he is from Suzhou, Jiangsu.

Shanshi (Suzhou Calligrapher) is honorary president of Jinling Painting and Calligraphy Institute and senior painter of Shicheng Painting and Calligraphy Institute. Influenced by my father, I studied calligraphy from an early age. I took the first book as a copy and paste of Ou Yangxun, and after studying hard, I gradually formed my own style. Running script is unique and not surprising, free and easy, vigorous and powerful, and quite charismatic. His works are widely circulated and exhibited in Nanjing, Jiangsu and other places for many times. Collected by people from Japan, Hong Kong, Macao and Taiwan. The pen is sealed.

It is impossible to verify whether your calligraphy is genuine.