Zhu Guolin, also known as Shiyu, also known as Maoyuan. Born in Tianmen City, Hubei Province in August 1955 (Yiwei Year). He is currently a member of the Chinese Calligraphers Association, a member of the Chinese Calligraphers and Painters Association, an academician of Chinese famous calligraphers and painters, and a researcher of the China Elderly Calligraphy Research Institute.
So this pen holder is a modern work.