Timber species identification and selection principles of wooden components in the Sunjialou Cultural Relic Building, Nanyang City

To support the scientific restoration of Sunjialou Cultural Relic Building (Nanyang City), optical microscopy was employed to identify the timber species of key wooden components. The results are as follows: (1) Timbers belong to four families and five genera including Larix sect. Multiseriales, Pinus sect. Cembra, Cunninghamia lanceolata, Quercus sect. Cerris, and Ulmus sect. Madocarpus. (2) Timber selection exhibits dual characteristics of functional adaptation and regional resource dependence