In order to help the restoration and conservation of the Zhaxi Conference site,and to understand the timber-using habits of ancestors in southern Sichuan and the degradation of wooden components,the wooden components of the Zhaxi Conference site,which was originally built in 1835,were appraised using the method of timber anatomy to identify the species,and the degree of degradation was evaluated using fluorescence polarization in combination with physical properties.The results show that the window frames were made of Cupressus spp.(Cupressaceae),the foot beaming and weatherboards were made of Pinus spp.(Pinaceae),the floorboards were made of Picea spp.(Pinaceae),and the beaming and columns were made of Cunninghamia spp.(Taxodiaceae).Cypress,pine and fir are distributed in Weixin County,indicating that the residential buildings were mainly made of"local materials".Window frames were the most severely degraded,followed by the beaming,and the rest of the ancient wooden components were not significantly different from the modern timber in terms of degradation.The degree of degradation of a wooden component is related to its tree species and location,with termites,sunlight and rainwater being the main causes of degradation of wooden components.
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