1. Transplanting: Koelreuteria paniculata is a deep-rooted tree species, which needs to be transplanted many times to form a good and effective root system. Sowing seedlings can be dug into furrows after defoliation in the autumn of that year; Plant separately in the next spring. Because the trunk of Luan tree is not easy to grow straight, it is necessary to cut off the stubble at the first time and strengthen the management of fertilizer and water. In spring, branches grow from the base, and those straight and strong branches are selected and cultivated into trunk, and then the trunk grows quickly and straight. If the first interception does not meet the requirements, it can be intercepted again in the spring of the following year. It should be transplanted every three years or so in the future. When transplanting, the main roots and thick lateral roots should be cut off properly to promote the generation of new roots. The young trees of Luan tree grow slowly, so the first two transplants should be properly densely planted, which is conducive to cultivating straight stems and saving land. After that, it should be properly sparse and cultivated well.

2. Shaping and pruning: the crown of Luan tree is nearly spherical and the tree shape is regular, generally using natural tree shape. Due to different uses, its plastic requirements are also different. Roadside saplings require a straight trunk, the height of the first branch is 2.5 meters to 3.5 meters, the crown is complete and plump, and the branches are evenly distributed. Courtyard shade trees require a large and dense crown, and the height of primary branches is lower than that of street trees. In the process of cultivation, corresponding pruning measures should be taken around the above requirements. Generally, it can be done in winter or during transplantation.

3. Planting: Koelreuteria paniculata is a greening tree species, and the planting spacing of urban streets is generally 5_8 meters. As a road center isolation belt, the planting spacing can be appropriately reduced. As street trees, the planting distance of highway greening is generally 5- 10 m, and evergreen trees such as Ligustrum lucidum and Tabai can also be planted, with good results. Most of the Luan trees are mainly Huangshan Luan trees. Because of its weak cold resistance, planting in spring should be given priority to in the north, and cold protection measures should be taken in autumn. Planting in the south can be carried out in spring and autumn. It is best to plant large seedlings with soil balls, and large seedlings above DBH 3cm can be planted with fixed poles according to the actual situation. It is best to apply preservatives to the incision to reduce water evaporation. When planting, the roots should be stretched and watered in time after planting to ensure the survival of trees. Luan tree grows rapidly, and can be pruned appropriately according to the situation after defoliation every year to maintain a good tree shape.