No, longan is also known as longan grass, also known as the seed of vegetables, days eggplant, cattle sour pulp, Wu beet, is the family of Solanaceae plants, stems erect, multi-branched, its leaves are ovate or heart-shaped, like pepper leaves, sharp tip; summer will be open white flowers, 4-10 into a cyme; globular berry, ripe black-purple. Blood Tongcai is a subtropical jungle grasses undergraduate plants, growing in Hainan primitive dense mountains, 13 hours of photosynthesis per day, tropical jungle sea breeze rain moisturized. Rich in resveratrol, quercetin, rutin, plant sterols, linoleic acid and a variety of trace elements, has a "green health food" reputation.