Handmade paper honeycomb sandwich panel, using high-quality color coated steel plate as the surface layer, with flame-retardant paper honeycomb core material sandwiched inside, using manual manufacturing technology. Aluminum alloy keel or iron keel frame is used around. This product is easy and fast to install, with significant comprehensive benefits. Widely used in functional partitions and ceilings in factories, laboratories, and various places in industries such as food, pharmaceuticals, electronics, scientific research, aerospace, and healthcare. Specially suitable for high cleanliness areas, it is currently an environmentally friendly board promoted in cleanrooms.