Is this Chen Zhenyuan's calligraphy valuable?

You can go to the calligraphy market, hang it on the calligraphy website and see how much the public bids, and you will know the truth roughly.

Chen Zhenyuan, Zi Zi Hao. 1944 Born, university culture. I started learning calligraphy at the age of 38 and have more than 20 years of experience so far. He has high attainments in many calligraphy styles, among which the study of European regular script is the most exquisite. After middle age, it is more compatible with a hundred schools of thought, depending on the danger of European books and defending the stability of the North.

Calligraphy is the most classic national symbol in the development of traditional culture and art in China for five thousand years. It is an art form of writing Chinese characters with a brush, which has aesthetic inertia.