What does the calligraphy and painting with the dragon seal stand for?

Name stamp, year stamp.

The calligrapher's dragon seal, the name seal represents the calligrapher's surname, that is, the calligrapher's surname is Long, and the year seal is a calligraphy work created by the calligrapher in the Year of the Loong.

Calligraphy and painting belong to a particularly delicate category of antiques, such as calligraphy and painting of works of art.