Red oak originated from American red oak and belongs to deciduous trees of Quercus in FAGACEAE. The color, texture, characteristics and properties of red oak will change with different producing areas. Red oak in the south grows faster than that in the north, and the wood is harder and heavier. Generally, it is sold in the north and south according to the place of origin. Southern wood is red in color and has chromatic aberration, which is suitable for dark painted products. The northern wood is light red and white with uniform color, which is suitable for light-colored products, and the price difference between the north and the south is large.

Ebony ebony is a large zebra wood in Africa; Cajanus cajan was called Wu or Wu Wen in ancient times. Ebony belongs to cajanus cajan of Sumeriaceae, and its wood is shiny. No special smell and taste; The structure is thin and uniform. The air-drying density is 0.77 g/cm3.

Ebony sofa is suitable for the north.