wú huàn zǐ / de / guǒ pí / hán yǒu / tiān rán / zào sù / kě yǐ / zhì zuò / huán bǎo / xǐ dí jì无患子的果皮含有天然皂素,可以制作环保洗涤剂。The peel of soapberry contains natural saponin and can be used to make eco-friendly detergent.