2. Short cut: When red maple is maintained, if the light is insufficient, it may lead to too many branches. At this time, it is necessary to cut short and cut off some long branches, which will also make the branches more evenly distributed.

3. Sparse: In the vigorous growth period, there are many messy branches, which seriously affect the appearance. At this time, we should pay attention to thinning, properly cut off the branches that are too densely distributed, and remove the branches of diseases and pests and delicate branches, which can also increase the light transmittance and permeability, which is more conducive to subsequent growth.

4. Modeling: The red maple is mainly ornamental, and it should be trimmed according to the overall modeling to keep the overall beauty and become more pleasing to the eye and ornamental.