2. The flavor is different. Bitter rakkyo, scientifically known as Allium cepa, also known as Asiatic Keeling onion, is a vegetable plant. It belongs to the lily family, a perennial herb, and is a specialty of the Chongqing, Sichuan and Guizhou regions. It forms a thick base without a normal bulb due to disease or insect attack or unfavorable environmental conditions. Also known as bitter wild rice, commonly known as small garlic, the growing period of 10 months, its flavor is slightly bitter, has the effect of clearing away heat and detoxification, can be cold, soaked, soup, especially in soup is more delicious, y favored by diners.