The original panel was naturally weathered, and the panel in 2022 was baked. Panels are generally not baked. At that time, the output was not much, the panel inventory was relatively large, and it was ventilated for a long time. Generally, the storage time is about 3 years, so the weathering of the panel is naturally loose, with fast sound transmission and sensitive response. In 2022, the output of guzheng surged by tens of thousands, which made the production "stretched" and urgently needed changes in technology and technology to adapt to it. Guzheng made by regular manufacturers adopts the panel soaking process: the panel is soaked in water, after a period of time, the gum in the wood is leached, and then it is artificially dried to make the panel naturally loose and dry. So the color is worse than before. Guzheng is a long wooden stringed instrument. In the Tang and Song Dynasties, there were thirteen strings, and then it was increased to sixteen strings, and now it has developed to twenty-five strings. Also known as Zheng.