The source of preserved eggs has been controversial for nearly twenty years, one is Gaoyou, Jiangsu, and the other is Honghu, Hubei. But before these twenty years, no one argued with Yiyang, which is an indisputable fact. Except that Chairman Mao was from Hunan, mainly during the planned economy period, Yiyang's preserved eggs were directly designated as state banquet products by the Ministry of Foreign Affairs.

Yiyang preserved eggs have a history of more than 600 years. It is said that when Zhu Yuanzhang rebelled, he sent Chen Youliang to Dongting Lake to collect a large number of duck eggs. The reason why a large number of ducks are collected is mainly to improve the food of soldiers before the war.

Inspection method of preserved eggs in Songhua River

One view: look at whether the packaging material is moldy, whether the eggshell is complete, and whether the shell color is normal (the green cylinder color is better).

Second, put the egg in your hand, gently throw it up and throw it several times in a row. If you feel elastic and trembling, the heavier egg is a good egg, otherwise it is a poor egg.

Three shakes: hold both ends of the egg with your thumb and middle finger, shake it up and down in your ear, and hear the sound of water or impact. If you can't hear the sound, it's a good egg.

Photo 4: If most eggs are black or dark brown and a few are yellow or light red, they are high-quality eggs. If most of them are yellow-brown transparent body, they are immature preserved eggs.

The above contents refer to Baidu Encyclopedia-Preserved Eggs.