Hard pen calligraphy. . I feel no progress after practicing for a year or two.

This is a hurdle for learning calligraphy. When you practice to a certain extent, you will feel that you are no longer making progress, and even feel that your handwriting is getting worse. Just stick to it, see more, think more and practice more. After this, your level will go up a step. Of course, there will be another hurdle waiting for you.