Potatoes are native to South America and were brought to Europe by the Spanish in the 16th century. However, Europeans have never been very fond of them, especially the French. Because its "fruits" grow underground, rather than reaching into the sky like noble ears of wheat. Wheat ears can be made into bread and communion wafers, while potatoes are considered to be involved with the devil and are witch grass like mandrake, belladonna and other plants. Potatoes have long been considered a poor man's vegetable. The dignitaries disdain to eat it, but they also admit that it is an indispensable and cheap food that can be used to feed soldiers in the army and fill the stomachs of the common people when famine comes. By the 19th century, Van Gogh still painted a miserable scene of potato consumers in his famous oil painting "The Potato Eaters": In a dark miner's dormitory, a disheveled family ate sadly. Potato. Potatoes have always been a very common food, just like a simple child in a farm family, it is not easy to be discovered and valued. It grows in the land that is not noticed by people, unlike apples hanging brightly on the branches. The potatoes dug out are also gritty, just like mud. It was not until recent years that people discovered and paid attention to potatoes. On September 14, 1999, under the auspices of Dr. Patrick Sabatier, a sports nutritionist at the Paris Medical Teaching Center, a special seminar on the special nutritional value of potatoes was held. Potatoes are indeed worthy of being called the "treasure" among vegetables. It contains less than 90 kcal per 100 grams, which is less than rice and pasta, especially far less than bread, and it contains protein equivalent to 2% of its own weight, and its main amino acids The content is almost equal to that of eggs. It is also rich in minerals such as magnesium, potassium, and iron, with a higher potassium content than bananas. It also has a high vitamin content, including not only vitamins B1, B3, and B6, but also vitamin C that can fight scurvy. It is the most ideal food for dieters. Then I thought of jade. Before jade was discovered, it was just an ordinary stone.