Yongning is an ancient city in the Ming and Qing Dynasties. Since the Ming Dynasty, it has been circulating beyond the Great Wall: "From Nanjing to Beijing, you should eat tofu in Yongning". There is also a local folk proverb about tofu: "It is yellow to carry the case, and it is alive all over. As soon as the knife is pulled, the stubble is thin. It is cotton in the hand and thin in the mouth. It is tough when it is cooked in the pot and empty when it is fried. " It shows that the tofu in Yongning ancient city is extraordinary.
The tofu in Yongning ancient city is delicious and civilized, and it is famous because of Yongning water, high-quality soybeans and exquisite craftsmanship.
Yongning area is located in the eastern edge of Yanhuai basin, surrounded by mountains on three sides, and mountain springs gather in Yongning underground from three sides. The water is clear and mellow, rich in minerals such as calcium, iron and magnesium. The salinity and total hardness of water are very suitable for tofu processing. It can be said that there is no tofu without water in Yongning ancient city.
The raw materials of tofu in Yongning ancient city are selected from the high-quality soybeans in the local green agricultural products base. Soybean is not only excellent in variety, but also free from chemical fertilizers and pesticides, and there is no pollution around it. It is a natural pollution-free food, rich in iron, phospholipids, cellulose and phytoestrogens. It can be said that processing tofu with water from Yongning ancient city originated from nature.
According to legend, tofu began in Liu 'an, the king of the Southern Han Dynasty, with a history of 2,000 years. Because tofu contains high protein, low fat and no cholesterol, it is rich in nutritional value. No wonder Yuan Mu, a writer in Qing Dynasty, said, "Tofu is more delicious than bird's nest."
First, smart incentives. Soybean is rich in phospholipids and is an important substance for building a smart brain. Because 20%-30% of the human brain is composed of phospholipids, eating tofu can increase the release of acetylcholine, thus improving people's memory and acceptance. The plant protein in soybean is the basic raw material for the brain to engage in complex intellectual activities. Increasing the plant protein content in food is to increase the excitement and inhibition function of cerebral cortex. , improve work efficiency.
Second, whitening. Soybean contains phytoestrogens, which are similar to estrogen, but have no side effects. Known as the health messenger, stay and protect your face. At present, there is a fashion among Japanese women, which is called "eating soybean milk for whitening".
Third, the five effects of anti-cancer. Soybean contains at least five substances with anticancer effect. Proteinase inhibin, phytase, phytosterol, saponin, isoflavone. New york University found that protease inhibin in soybean can inhibit protease skin cancer, bladder cancer, breast cancer, colon cancer, lung cancer, pancreatic cancer and oral cancer. And the effect is strange.
Fourth, prevent cardiovascular and cerebrovascular diseases. Soybean saponin has the effects of reducing blood lipid, antioxidation, anti-atherosclerosis and immunomodulation. Potassium is an essential trace element for human body, and the decrease of potassium will lead to heart failure. Using bean products is one of the effective ways to supplement potassium. Phytosterols in soybeans enter the human body and compete with cholesterol, effectively reducing cholesterol absorption, which is very beneficial to the prevention and treatment of heart disease and stroke.
Fifth, prevent deafness. Soybean has a high iron content. Iron supplementation can dilate microvessels, soften red blood cells, ensure blood supply to ears and effectively prevent hearing loss.
The beancurd of Yongning Ancient City in Yanqing has been recorded since the Han Dynasty, and it became a court tribute in the Qing Dynasty. Every household has a history of making tofu. The tofu of Yongning ancient city has been passed down to this day with its unique production technology and rich nutritional value, and it is the top grade for disease prevention, health care and eating.