What are the characteristics of the trunk-layered central leader tree form of jujube trees?

The trunk-layered central leader tree form of jujube trees has 7 to 9 main branches in the whole tree, divided into 3 to 4 layers, alternately borne on a strong central leader. This tree form has a relatively tall tree body, with main branches arranged in sparse alternating layers; the inner canopy receives good light, the branches are numerous but not disordered, and the empty cavity is very small, so it is relatively easy to achieve high yield and has a long lifespan. The disadvantages are: the canopy is too tall, making management inconvenient; if the layer arrangement is inappropriate, the light conditions are worse than those of the open-center form, affecting jujube fruit quality.