Four to five years after planting can be harvested. Harvest the buds in summer when the flowers are not open, remove impurities. Sophora japonica (Sophora japonica rice) alias white acacia, acacia, home acacia, bean acacia, red-leaf acacia, gold medicine tree, protect the house tree. Sophora japonica and pine, cypress, ginkgo are China's ancient and famous trees. Wild in the hillside roadside or planted in the garden. Cultivated in wet, deep, fertile, well-drained sandy loam. Mainly produced in Hebei, Shandong, Henan, Shaanxi, Jiangsu, Guangdong, Guangxi, Liaoning and other places. Seedling height of about 15 cm, every 666.7 m 2 to apply dilute human and animal manure water 1000 kg, watering after application; June to July every 666.7 m 2 to apply urea 15 kg, or apply dilute human and animal manure water 1500 kg, the second year of application of fertilizer 2 to 3 times. After planting, every year in the spring combined with watering, every 666.7 m 2 to apply 15 kg of compound fertilizer.