The choice of wood species directly impacts the load-bearing capacity and longevity of the sofa. Hardwoods such as Oak, Rubberwood, Beech, and Walnut are the industry standards for wholesale procurement due to their high density and resistance to splitting. For cost-effective mass production, Rubberwood is highly recommended as it offers excellent screw-holding power and takes stains well. Ensure the moisture content is strictly controlled between 8% and 12% to prevent warping or cracking during cross-border transit and varying climate conditions.