What is the concept and use of fully connected core board used in Pu Zuo, Guangdong? Who can explain?

Full-core splicing refers to splicing each layer of plywood in horizontal and vertical directions by using core splicing or tooth splicing technology, and splicing the surfaces of small veneers together with glue seams. Half-core gluing means that only the middle layer and the surface layer of plywood are glued with core veneers, and the other layers of small veneers are only paved in common butt joints without any connection treatment.