The steaming barrel is made of high-grade wood, such as cedar or Chinese fir, which is carefully processed by degreasing, drying, shaping, polishing, and painting (some of which will carbonize at high temperature). Smooth and bright surface, good hand feeling, good color, corrosion resistance, waterproof, not easy to deform and crack. Jianzhengtang steaming bucket is of high quality and can adapt to different climatic conditions in the north and south and even foreign climatic environments.