The bed sheet is mainly used for the production of wooden bed, and the fir board is a good bed material "Fir King, Elm phase". Cunninghamia, as a high-quality wood that is traditional, popular, and deeply rooted in southern China, is well known. The fir is soft and hard, the wood texture is straight, the structure is uniform, and it is still not cracked under the condition of humidity and temperature change; the fir has aroma, the material contains "Cymbolium", which can resist insects and rot; the fir also has certain Pharmacological effects.