Just buy the finished formula of preserved egg powder and make it according to the instructions. Start with a small amount and then a large amount. To make salted eggs, boil the water first. When it cools to about 50 degrees, add 3 ounces of salt per pound of water. Stir, and after 20 minutes, pour out the water and use the unmelted salt at the bottom of the bucket. Put the washed eggs into the container and add salt water to completely cover the seal. Try it after 15 days. If it doesn't meet your taste, store it for a few more days until it suits your taste.