Table 1. Classification standard of crown class.

Classification	Content
Dominant	As a standing tree that forms the top layer of the canopy, the canopy is well developed so that it receives sufficient vertical light and receives a part of the horizontal light from the side.
Co-dominant	As a standing tree forming the upper layer of the stand, it receives sufficient vertical light, but receives some horizontal light from the side.
Intermediate	The crown forms the lower layers of the dominant and semi-dominant trees.
Overtopper	A deciduous tree whose crown belongs to the lower tier and has not grown properly due to neighboring pressure.