This is a couplet, and the last sentence is: Five colors are called Jiangling Dream. This combination of "dream pen gives birth to flowers" can be described as interesting and natural. It is the door couplet of the old stationery store, and Guancheng is the place name. This sentence should be understood as: the spring picture written with a pen is more beautiful than the flowers in Guancheng! It means that a dream pen gives birth to flowers, which means congratulations to the person who bought the pen for writing a good article.