Sapindaceae, dicotyledonous plants, about 150 genera, more than 2,000 species, widely distributed in the tropical and subtropical regions, China has 25 genera, 56 species, produced everywhere, but the main origin for the southwestern and southern, such as longan and lychee for the famous fruit, Sapindus rind can be used to wash instead of soap, the bulk of the wood is very valuable. China's main genera are: Allophylus (genus), Dimocarpus (longan), Koelreuteria (Luan), Litchi (Litchi), Mischocarpus (stalked fruit trees), Sapindus (Sapindus) and so on.