(1) The site conditions are sunny and full of water, and the slope is below 25. The soil is lateritic red soil containing gibbsite, with deep soil layer, pH value of 4.5-6.0, good soil structure and organic matter ≥2%. (2) Culture of1. Seedling raising adopts layering seedling raising, grafting seedling raising and seedling raising. The strong branches of Huazhou pomelo mother tree were selected for layering cultivation for February-April and July-August. 2. Planting density is planted in spring or autumn, and the planting specification is less than 330 plants per hectare. 3. Young tree management Strengthen fertilizer and water management to promote early growth and rapid growth. When shaping young trees, in addition to the branches necessary for shaping, generally only overlapping branches, pests and diseases branches, short-cut overgrown branches and erect overlord branches are pruned. 4. Fruit tree management (1) Fertilization management requires 2.4kg ~ 7.0kg of pure nitrogen, 0.2kg ~ 3.0kg of phosphorus pentoxide and 3.0kg ~ 5.6kg of potassium oxide per 100Kg of fresh fruit. Fertilization throughout the year is divided into pre-flowering fertilizer, fruit-strengthening fertilizer and shoot-promoting fertilizer. (2) Flower thinning and fruit thinning include shoot control, flower thinning and fruit thinning. (3) Pest control: Focus on strengthening cultivation management, clearing gardens in winter and biological control. (3) harvesting young fruits. The harvesting period is from early May to mid-June. (4) processing 1. Processing of Exocarpium Citri Grandis Beads (embryo fruits) Fresh Exocarpium Citri Grandis fruits (young fruits) are bleached by boiling water and then dried or directly dried at high temperature, and the drying temperature is 80℃~ 90℃ (the same below). 2. Processing of orange peel (peel) Fresh orange fruit is bleached with boiling water or dried at high temperature to break green and soften, then the top of orange fruit is cut off with a cutter, and the downward radius is cut to 3/4, then it is cut off with 5 knives or 7 knives, and the pulp in the fruit is cut off and dried.