Five tones one
Zhanggong
The following seal is read vertically from the right:
Trinity idiot
Zhang Gong, alias Trinity Idiot, was born in 1943, a native of Binyang, Guangxi, a famous calligrapher in China and an artist with both ability and political integrity.
Whether your picture is his original is best to ask a professional organization or person to identify it!
I hope I can help you.
Attention; Z data comes from the network.