Introduction to the sample room: The sample room is a place where the Kang family’s products are displayed and used for merchants to view samples and place orders. There are salt, seafood, southern raw lacquer, tea, rice wine, silk and satin, porcelain, cotton from Shaanxi, and other products from Shandong. Cotton cloth, peppers, Henan local specialties, medicinal materials, etc. show the richness and diversity of the products that Kangjia operated across the country. "Rare goods are available" specialties and samples from various places are the main basis for commodity circulation. The main warehouse attaches great importance to mutual adjustment. Visitors and merchants come here to view samples and place orders. After selecting the samples, they go to the bank opposite to pay a deposit.