What kind of copybook should I choose if I want to practice calligraphy (hard pen calligraphy)? Please recommend some copybooks.

Generally speaking, books should adopt ancient methods, and the longer they are preserved, the more attractive they are. But many up-and-coming books in modern times are also of great learning value.

It is suggested to study Ling Fei Jing in regular script and the copybook of modern calligrapher Honggen Shen. Tian Yingzhang's and Pang Zhonghua's calligraphy is also good and worth seeing.

Calligraphy learning depends on perseverance. I suggest you dabble in the theoretical knowledge of calligraphy while practicing constantly. All kinds of calligraphy magazines and newspapers have good explanations, which are very helpful for your progress.

I wish you success in your studies!