“石刀” (shídāo), or "stone knife," refers to a type of ancient tool made from stone, primarily used for cutting and carving. These tools were essential in prehistoric times, aiding in hunting, food preparation, and crafting other implements. The design of stone knives varied, with some featuring sharp edges and pointed tips, making them versatile for various tasks. The use of stone knives is often associated with early human cultures, such as the Paleolithic and Neolithic periods. Archaeological findings have revealed these tools in various regions, highlighting their significance in the development of human technology and survival strategies.