Ask for a good hard-pen copybook recommendation

The following are some excellent hard-pen copybooks for your reference: 1. Ou Yangxun Regular Script Manual: It is an ancient regular script copybook and a classic regular script, which provides a large number of temporary writing materials and model characters, and is suitable for readers engaged in hard-pen calligraphy. 2. The Book of Mi Fei: It is a note written by Mi Fei, which contains Mi Fei's calligraphy techniques and provides a large number of model essays, suitable for beginners and calligraphy lovers. 3. Yan Zhenqing Calligraphy Manual: It is a classic copybook about Yan Zhenqing's calligraphy, including Yan Zhenqing's calligraphy works such as Kai, Xing and Cao, which is suitable for students with a certain hard-pen calligraphy foundation to practice. 4. Zhao Mengfu Calligraphy Spectrum: It contains a variety of calligraphy works of Zhao Mengfu, which is suitable for students and advanced learners with a certain calligraphy foundation to do further practice. These are some excellent hard-pen copybooks. You can choose according to your own level and preferences, keep practicing and improving, and reach a higher level.