In our part of the world, the most representative food is “hard food”, where humans eat early on, and in the Weekly Book, there is “a day full of bitter food show”, and in the Poetry, there is “suffering, under the sun.” This shows the history of people eating bitter food. We're living in cities now, and it's hard to find veggies. In addition to bitter vegetables, some of the other bitter vegetables are also good, as are vegetables such as sauerkraut, dandelion, bitter melons, lettuce, and artemisinin。