The ash preservation method puts about 12 cm thick dry grass ash at the bottom of the egg container, and then each layer of eggs is covered with ash. The top ash cover is thicker. Place the container in a dry and ventilated place and check it once a month. This method can save eggs for 1 year without deterioration. The bean preservation method spreads 10 cm thick soybeans on the bottom of the container, then a layer of eggs on a layer of beans, and the upper layer of soybeans spreads slightly thicker. After filling, cover with a well-ventilated lid and store in a cool, dry place. Check every two months or one month. Soybeans used should be sun dried every two months. This method can save 8-10 months. Alum preservation method to take 0.5 kg of alum, placed in 7.5 kg of warm water (water temperature 60 °C -70 °C) dissolved, poured into the container after cooling, the eggs into the container, submerged egg noodles. Using this method, fresh eggs can be kept fresh for 3 months in summer and 5 months in winter. At the bottom of the rice bran preservation method, a 10 cm thick rice bran is placed on the bottom of the container. The fresh eggs are placed layer by layer and filled with a layer of rice bran. Checked once every two weeks, if there is deterioration of eggs to be singled out in a timely manner. Storage temperature is maintained at 10°C-15°C, and it can be stored for 3 months. Lime solution preservation method 0.5 kg of lime and 0.1 kg of silver shall be added in order to 2.5 kg of water. After the solution is dissolved, 22.5 kg of cold boiled water shall be added. The fresh eggs shall be gently placed into the solution and the lid shall be covered to prevent evaporation and falling in. dust. Storage temperature is kept below 25°C. This method can keep fresh for 6 months. Sand preservation method to take yellow sand or river sand, fully dried, remove impurities. Put a layer of sand on the bottom of the container, then put a layer of eggs, then put a layer of sand, so that the layers are put in, and the top sand cover is thicker. After installation, place the container in a dry and ventilated place and check it once a month. The temperature is maintained at 10 °C -15 °C, using this method can be fresh for 4 months. The wax liquid preservation method dilutes the liquid wax and then coats the surface of the fresh egg to close the pores on the surface of the egg shell, and the temperature of the storage is maintained below 20°C. The law can be kept fresh for 8 months. The water glass preservation method takes 0.25 kilograms of water glass (ie, sodium silicate solution), dilutes 2.5 kilograms of water, and soaks the egg in the solution, and then removes it to dry. This method can keep fresh for 4 months.