Ancient wood is generally made of logs and sawn boards. The most commonly used wood is fir. It is not the Chinese fir that is often used as a sauna board. It is also useful for pine, millet, eucalyptus, cedar, and nanmu. (After the domestic ban, the timber imported from foreign countries, from the structure to the decorative foreign woods are European red pine, North American spruce, red cedar, American southern pine, Russian scotch pine, American red scorpion, scutellaria, Douglas fir, New Zealand radiata pine, hemlock, pineapple, and mahogany. SHAN is used for pillars, purlins, purlins, scorpions, and strips in halls and pavilions. The anti-corrosion performance and compressive performance of Chinese fir are stable, not easy to be infected by insects, and the wood is light and not easy to deform. It is an ideal building material. The rigidity of the compressive wrist force is very good, and the seismic performance is also good.