The original panels are naturally weathered, the 2022 panels are baked. Panels are generally not baked. At that time, the output was not much, and the inventory of panels was relatively large, and they were kept in a ventilated state for a long time. Generally, the "drying" storage time was about 3 years, so the panels were naturally loose and transparent during weathering, and the sound transmission speed was fast and the response was sensitive. In 2022, the output of guzheng will surge by tens of thousands, causing production to be "stretched" and urgently requiring changes in technology and technology to adapt. Guzheng made by regular manufacturers adopt a panel soaking process: the panel is immersed in water, and after a period of time, the gum in the wood is leached out, and then artificially dried, so that the panel is loose and has the same effect of natural air drying. So the color is worse than before. The guzheng is a stringed instrument, long wooden in shape. In the Tang and Song Dynasties, there were thirteen strings, later increased to sixteen, and now it has twenty-five strings. Also called "Zheng".