This plum is very different from any other improved breeds. With the history of about 2000 years as a traditional endemic plum, this plum is very strong botanically and has 4 times of calcium, 6 times of iron, 7 times of magnesium, and 5 times of zinc in an apple. Of course citric acids in a plum are much more than the contents of an apple. Usually people say endemic plums have big seeds in the middle of fruits and less flesh of fruits and hence those are not suitable for making processed and/or preserved foods. This is why usually people select an improved breed of plums. However, they do not know the value of Songgwang Seoljungmae. Songgwang Seoljungmae dares to have enough flesh of fruits and be very suitable for food making.