1, Li Ding's hard-pen calligraphy works, as shown in the following figure:

2. Wang Xiaoping's hard-pen calligraphy works, as shown in the following figure:

3. Singer's hard-pen calligraphy works are shown in the following figure:

4. Cliff hard pen calligraphy works, as shown in the following figure:

5. Ma's hard pen calligraphy works are shown in the following figure:

6. Zhang Sec's hard-pen calligraphy works, as shown in the following figure: