There are many collections of the four treasures in the study.
Sihaihaiyanmo is one of the four treasures of the study. The next sentence can be "there are many treasures in the four treasures of the study". The Four Treasures of the Study refers to the four tools commonly used by literati in calligraphy, painting and literary creation, including pens, ink, paper and inkstones. "Studying ink in the Four Seas" describes the production process of ink, while "Collecting Many Treasures of the Study" emphasizes the literati's cherishment and collection of study utensils. It expresses the literati's love for the art of calligraphy and painting and their respect for traditional culture.