These richly decorated window lattices are all assembled with mortises and tenons. On the one hand this saves material, and on the other hand if the whole lattice were carved from a single piece of wood it would warp more easily. The mortised strips of wood are also much more flexible and much stronger.
這些繁華似錦的窗櫺都以卡榫方式組接而成，一來是節省木材，二來是以整片木頭雕製容易彎曲變形，相對的以一根根木條卡榫反而有彈性、可承受重力。