What textbook is better for primary school students to learn hard pen calligraphy? Please recommend it.

Hard-pen copybooks in Hotan, Pang Zhonghua are all good, with block letters and running scripts. Now there are many copybooks in the bookstore to practice calligraphy. Buy it and practice it. Don't worry when you write at ordinary times, so you will make great progress after practicing for a while. Primary school students have not finalized their writing, which is the best time to practice their writing.