Stone mortar and pound. The one that beats things is called a pound, and the one with stones underneath is called a stone mortar. Usually used for making rice cakes.

Stone mortar (shí jiù): It is a production tool made by humans from various stones and used for smashing, pounding, and grinding medicinal materials and food. Before electrified production, human grains were mainly processed into food using this production tool. It can be said that stone mortars were necessities for ancient human life, and stone mortars and wells were symbols of human settlements. After humans entered the electrification era, stone mortars were gradually eliminated and are still used only in some remote areas without electrified equipment. In many villages in China, stone mortars that have been out of use are still well preserved and have become objects of nostalgia for many people.

2 Chung (chōng): It means to pound things in a stone mortar or mortar to break them or peel them.