Dr. Ben used to use autologous rib cartilage for ear reconstruction, which is safe but more traumatic, especially for young children. That is why the plastic surgery community has been trying to use materials to replace autologous cartilage. This method uses prolonged skin expansion in an attempt to obtain safer skin. The longer the expansion time, the thicker the dilator envelope becomes so that it is safe enough to cover the Medpor material without the need to take a temporal fascia wrap and without the need for skin grafting. The greatest risk of Medpor ear reconstruction is skin breakdown, and with the previous method, the temporalis fascia was used and the last restorative weapon was lost after the breakdown and the whole procedure ended in failure. However, this method preserves the integrity of the temporal fascia, and if there is a breakdown, there is still room for repair, giving the surgeon and the patient an added confidence and guarantee. I strive to perform ear reconstruction with minimal trauma and safely, with room for repair if something goes wrong. The presentation is as follows: 1. The skin is expanded as much as possible to reach six months. 2. After six months of expansion, the expander is removed and ear scaffold material is placed. 3. In the 3rd stage, the residual ear can be repaired. With material ear reconstruction, a bit of personalized sculpting may be missing, but the child will get a roughly similar ear with minimal pain. Such an operation can be performed when the child is young, without having to wait until the thorax has developed to a certain level (our clinical experience is that children generally grow to the age of 12, when the rib cartilage is more fully developed and there is more ample time for ear stenting), thus avoiding more psychological damage to the child at a young age and allowing earlier and normal contact with society. The disadvantage of this method is that the material is still hard and there is a possibility of breaking the skin, but the good thing is that there is still the temporal fascia intact and there is room for repair. In addition, the material is not yet domestically produced, relying on imports, which are too expensive.