A, the main ingredients: onion 1,000 grams Seasoning: vinegar two 00 grams, 50 grams of sugar, salt one 0 grams Steps: (a) the onion washed, peeled off the old skin (b) the rest of the onion cut into julienne or block, sprinkle with salt, stirring evenly (c) the sugar poured into the vinegar, stirring until completely melted (d) the onion sprinkled with salt, drained out of the water, and then poured into the bowl of sugar and vinegar, stirring well. (d) Drain the water from the salted onion and pour it into the bowl of sweet and sour vinegar and mix well. Second, onion, alias: onion, Dutch onion, lily family, genus onion biennial herbs. Bactericidal and antibacterial ability, very few pests and diseases, is a relatively clean pollution-free green food. Onion contains prostaglandin A, can reduce peripheral vascular resistance, reduce blood viscosity, can be used to reduce blood pressure, relieve stress, prevent colds. Onions can also remove oxygen free radicals in the body, enhance metabolism, anti-aging, prevention of osteoporosis, is the middle-aged and elderly unavailable health care food