The eggs used for the fluffy eggs are duck eggs, laid by ducks.

Skin eggs, the various regions to give it different names such as fluffy eggs, eggs, colored eggs, people imagine the most appropriate name to crown its head, but its oldest name is called "cowhide duck", the "sub" The name "Zi" means "egg".

Despite the fact that the U.S. has put the egg at the top of its list of the top 10 most disgusting foods, the egg is still a traditional delicacy in the minds of the Chinese. There are differences in food between the north and the south of China, and there are many different customs, not to mention the fact that China and the United States are located on opposite sides of the Earth's diameter, about 20,000 kilometers apart, separated by the vastness of the Pacific Ocean, which is a long way to go.

Sponge egg history

Sponge egg processing technology in China has a long history, the earliest in the Yuan-Yan-You six years, the agronomist Lu Mingshan creation of the "Nongsang Clothing and Food Summary" book recorded in the processing of pine eggs. In the Ming Dynasty, pine eggs is the court tribute, the end of the Ming Dynasty Chongzhen six years written "to raise food orders" in the detailed records of the pine eggs processing technology, and is used today.

"Raising food orders" recorded: "the first vegetable decoction soup, within the cast pine and bamboo leaves several pieces, to be warm will be washed eggs, every 100 pounds of salt ten two, real chestnut firewood charcoal ash five liters, one liter of lime, such as the usual tune pickled, into the altar for three days, take out of the plate to adjust the upper and lower, reloaded over three days, and as such, **** three times, sealing more than a month into the skin of the egg. "