What are the modeling forms of stump bonsai?

Stump bonsai is mostly woody plants, which are planted in pots through artistic processing. Through measures such as binding bent branches, shaping and pruning, controlling fertilizer and water, the roots, stems, branches and leaves are old, delicate and intertwined, showing various painting postures. The modeling of pile landscape can be divided into natural and regular, and the general natural pile landscape is more common. ① According to the posture of the trunk, the common shapes are straight trunk, inclined trunk, cliff trunk, horizontal trunk, vertical branch, bent trunk, water-facing trunk, split trunk, prone trunk, attached stone, wrapped trunk and connected root. (2) According to the cultivation methods and allocation quantity, the common modes are single stem, double stem, multi-stem and co-planting.