1. Promote the growth of branches: In the seedling stage of Pinus thunbergii, we can promote the growth of branches by picking buds and pruning, and cultivate many main branches.

2. Pruning and shaping: During the growth of black pine, redundant branches can be cut off by pruning and shaping, leaving several main branches as the trunk to form a good tree shape.

3. Water and fertilizer control: Reasonable control of water and fertilizer can promote the growth of Pinus thunbergii and help to cultivate the main branches.