There is a teapot appraisal in Dalian, and the teapot appraisal center is a specialized institution to identify and distinguish the authenticity of teapot. It is usually composed of professional experts who identify teapot. With their own experience and skills, they made in-depth analysis and comparison on the material, manufacturing technology, lathe work, carving and other aspects of teapot, so as to identify the authenticity and evaluate it. In the purple sand appraisal center, people can ensure that the purple sand pots they buy are real famous products through professional appraisal institutions, avoid falling into the trap of illegal merchants and protect their own interests. Zisha Pot is a unique handmade clay handicraft in China. Its production began in Zhengde period of Ming Dynasty, and the raw material was purple mud, which was produced in Dingshu Town, Yixing, Jiangsu Province. The teapot is bullish in the auction market and is an "antique" with collection value. The works of famous artists are often hard to find. As the saying goes, "Yixing purple sand is enough on earth." There are three main factors to identify and evaluate the connotation of a teapot: beautiful structure, excellent manufacturing technology and excellent use function. The so-called image structure refers to the hukou. Skill is the standard to judge the quality of pot art, and its excellent practical functions are appropriate volume and weight, easy to hold the pot body, smooth rutabaga and seams, and smooth water flow from the spout.