What are the hard-pen calligraphy works of seven-character ancient poems?

Seven-character ancient poetry hard pen calligraphy works are:

1, seven-character quatrains hard pen calligraphy works, as shown in the following figure:

2, seven-character quatrains hard pen calligraphy works, as shown in the figure below:

3, seven-character quatrains hard pen calligraphy works, as shown in the figure below:

4. Hard-pen calligraphy works of seven-character quatrains, as shown in the following figure:

5, seven-character quatrains hard pen calligraphy works, as shown in the figure below:

6. Hard-pen calligraphy works of seven-character quatrains, as shown in the following figure: