I collected a photo of Gu Zhongan's old pen calligraphy, but I don't know which copybook it is from and the year it was published. Does anyone know?

I have a lot of these copybooks at home

They were probably published in the 1980s

I used to run a library

Now I don’t. I did it, and I have feelings for many books. I couldn’t bear to sell them, so I kept them at home, euphemistically calling them “study rooms”

Haha