Double-yolk duck eggs are a specialty of Gaoyou, Yangzhou. They are named because there are two yolks in one egg. Ducks give birth to double yolks because the food here is good, the ducks are strong, and they ovulate continuously, forming double yolks or even triple yolks. Gaoyou salted duck eggs are famous for their red color and rich oil. Double-yolk salted duck eggs are boiled and cut open. The egg white is like white jade and the yolk is like red tangerine. It is pleasing to the eye and has a unique flavor. (Yangzhou)

Gaoyou double yolk eggs are a local specialty of Gaoyou, Jiangsu. Gaoyou shelducks produce double yolks, three yolks, four yolks and more.

June 24, 2002 On September 13, the General Administration of Quality Supervision, Inspection and Quarantine approved Document No. 57 of 2002 for Gaoyou duck eggs to implement product protection in the region of origin from now on; on September 13, under the auspices of the "Bidding Winning Association" of the General Administration of Quality Supervision, Inspection and Quarantine, 11 experts from across the country were invited to pass the In the final review of the national mandatory standard for Gaoyou duck eggs, Gaoyou Duck Industry Park was determined to be a national-level Gaoyou duck agricultural standardization demonstration park; this is the tenth case in the country after Kweichow Moutai and the second case in the province after Zhenjiang vinegar. Products with protected area of ??origin are the first agricultural and aquatic products in the country to receive this honor. This marks that Gaoyou duck eggs have since entered the ranks of "national protection". It also means that among the three famous ducks in the country - Gaoyou duck, Peking duck and Shaoxing duck, Gaoyou duck has taken the lead in standardized production.

More than 900 years ago, Qin Shaoyou, a famous poet in the Northern Song Dynasty, presented duck eggs to his mentor Su Dongpo, who was then the Taichan in Xuzhou. More than 300 years ago, the great writer Yuan Mei visited Gaoyou and tasted Gaoyou duck eggs. He was very impressed. He left a record in the "Pickled Eggs" section of his "Suiyuan Food List·Small Menu": "Gaoyou's pickled eggs are the best." , thin in color and rich in oil, Gao Wenduangong likes to eat it first, and put it on the plate to serve the guests. It is always better to cut the shell and use it both yellow and white; do not keep the yellow and remove the white, as the flavor will be incomplete and the oil will disappear. "The Gaoyou duck egg processing factory also started early. In the 31st year of the reign of Emperor Guangxu of the Qing Dynasty (1905), Gaoyou's first egg product company, Yuyuan Egg Factory, came into being. In 1909, Gaoyou double-yellow duck eggs participated in the Nanyang Entrepreneurship Association's Chen Competition and won the reputation of an international famous product. The following year, they were exported to more than 10 countries and regions including the United States, Japan, Singapore, and Malaysia.

Gaoyou duck and Gaoyou duck eggs have long been famous and enduring. The fundamental reason is their excellent quality and unique flavor. Gaoyou duck is also called shelduck because the female feathers are similar to sparrows. It has the characteristics of strong physique, strong adaptability, deep diving, good at foraging for live food, can use both eggs and meat, and has low fat content. It can be made into salted duck, sweet-scented osmanthus duck, pipa duck, crispy duck and braised sweat duck, with different flavors. The most popular dish is "Laoya Soup", which is cool in nature and contains Chinese medicinal materials such as ginseng and qi. It is a good nourishing food for men in winter, so it has become a traditional delicacy reserved at banquets. Gaoyou ducks lay many eggs, with large egg heads and a large yolk ratio. The duck is famous both at home and abroad for its ability to produce double-yolk eggs. The egg quality can be summarized as "fresh, fine, tender" for the egg white and "red, sandy and oily" for the yolk. Wang Zengqi once wrote in "Hometown Food": "There was a time when it was difficult to find water in the sea, and I really looked down on salted duck eggs from other places." ""The characteristics of Gaoyou salted eggs are that they are fine in texture and rich in oil. The protein is not as dry and powdery as other places, and it tastes like chewing lime. It is usually eaten with a lot of oil. 'Use chopsticks to dig in and eat. As soon as the head of the chopstick is pierced, red oil will come out. "

River ditches, lakes and beaches are ubiquitous high-quality water resources. A natural feeding ground. Various small animals floating on the surface and living underwater provide the most delicious "live food" for Gaoyou ducks. This has also provided unique natural conditions for the development of ecological duck farming and the development of green products in recent years. In recent years, a number of high-quality brands that have obtained well-known and famous trademarks and green food labels have been developed, such as Red Sun, Sanhu, and Qinyou.

Gaoyou people not only cultivate Gaoyou ducks and double-yolked eggs, which are world-class products, but also create a rich duck culture. In the 1950s, Gaoyou folk singer Xia Guozhen's Gaoyou folk song "Counting Duck Eggs" shocked Kyoto with its humorous, brisk melody and rich local flavor, and was praised by Prime Minister 1. Gaoyou Duck is the business card of Gaoyou people. "If you don't know Gaoyou people, you can predict Gaoyou eggs."

Gaoyou duck and double-yolk eggs, as the image ambassadors of Gaoyou, have been famous and high-quality local products that have been presented as tribute to the court and as gifts to relatives and friends since ancient times.