Grainworms and locusts are not the same thing. According to relevant information query, it is shown that the grass insect, known as Liuzuo in Fuzhou, Fujian, and its scientific name is Nereis verrucosa, is an annelid, polychaete, aquatic animal, and looks like a centipede. Leeches, commonly known as leech, have been recorded in Shen Nong's Materia Medica. They have high medicinal value and grow and reproduce in inland freshwater waters. They are traditional Chinese special medicinal aquatic animals. Their dried products are brewed and used in traditional Chinese medicine. It has the effects of treating stroke, high blood pressure, clearing blood stasis, amenorrhea, bruises, etc.