Write a seven-rhythm poem.
Just write your favorite posts in hard-pen calligraphy, such as poetry, prose, etc. You can also write at least one seven-rhythm poem. With the signature, it should be almost 72 words.
Hard-pen calligraphy is different from ancient brush calligraphy. There are changes in thickness, lift and pressure. There are fewer changes in hard-pen calligraphy, as long as the structure is arranged properly.