When discussing lids, we naturally think of the mouth of the teapot, as the common saying goes "mouth and lid." Lids can be broadly divided into three major categories: 1.压盖 (Ya Gai/Pressing Lid); 2. 嵌盖 (Qian Gai/Inset Lid); 3. 截盖 (Jie Gai/Cut Lid). ## 1. 压盖 (Ya Gai/Pressing Lid) A lid that presses down on the mouth is called a 压盖 (as shown in Figures 1 and 2, called 线压盖/Line Pressing Lid). The "Han Ping Hu" uses a 明压盖 (Ming Ya Gai/Plain Pressing Lid), while the "Coffee Mold" uses a 线压盖 (Xian Ya Gai/Line Pressing Lid). **Operating precautions:** Plain pressing lids, especially square lid plates and large lid plates, must be thrown and dried together. Square lid plates must be made perfectly straight. ## 2. 嵌盖 (Qian Gai/Inset Lid) A lid that is inset inside the mouth is called an 嵌盖 (as shown in Figure 3). Inset lids include 平嵌盖 (Ping Qian Gai/Flat Inset Lid) and 虚嵌盖 (Xu Qian Gai/Hollow Inset Lid). A flat inset lid requires the lid plate surface to be equally flat, with the lid fitting inside neither too tight nor too loose, and rotating smoothly. "Ji Yu" uses a flat inset lid, while "Si Fang Zhu Gu" (Square Bamboo Drum) uses a hollow inset lid. Additionally, "Ba Fang Guo" and "Yin Gong" use ball-mouth inset lids. **Operating precautions:** For flat inset lids, use the extracted body core or line core as the base piece. The two sides of the lid plate cannot rely on rolling but must rely on trimming—just chamfer the edge slightly. For hollow inset lids, the lid must be made to fit onto the body, and the hollow piece must be firmly attached. ## 3. 截盖 (Jie Gai/Cut Lid) The arc line of the mouth and lid form a unified whole, as if the lid were a section cut from an integral piece (as shown in Figures 4 and 5). Examples include "He Jun De" and "Duan Zui Li Shi Guo" (Short-Spout Pear-Style Teapot), which use cut lids. **Operating precautions:** When making cut lids, ensure the lid and mouth form a unified whole. The edges and corners of the mouth should be crisp and clean, and sharp angles on the lid edge should be removed.