Why should we use posterior delayed flap with autologous rib cartilage stereotaxic scaffolding method for ear reconstruction? Congenital microtia is the most common congenital facial deformity after cleft lip and palate, and it is also the most common congenital deformity that causes facial asymmetry. The main treatment for congenital microtia is ear reconstruction. Successful ear reconstruction is determined by two factors: the ear scaffold and the skin covering the ear scaffold. The American Brent and Japanese Nagata method of ear scaffolding is created in two stages, and the skin covering the scaffold is directly utilized from the skin of the posterior ear area and the scalp. The ear scaffold of Korean Park and Chinese Zhuang Hongxing method is constructed in one time in three dimensions. The one-time three-dimensional construction of the scaffold has the advantage of solidity and reliability, and the postauricular delayed skin flap plus autologous rib cartilage three-dimensional scaffold method is used for ear reconstruction with excellent results of Zhuang Hongxing three-dimensional scaffold formation method. However, the stereoscopic stent requires more skin coverage with good blood flow, and both Park and Zhuang Hongxing method are solved by using skin dilatation method. But the long time of dilator injection requiring a long rest is unavoidable. Because of this drawback, many school-aged children need to take time off from school to undergo the procedure, thus making their parents hesitant in deciding whether to operate. In order to solve the disadvantage of long treatment time while retaining the advantage of using a three-dimensional ear scaffold to form the ear firmly in one go, Professor Ruyao Song, one of the leading plastic surgeons in China, adopted the method of forming the ear in one go in the 1980s, but because the application of this method easily leads to complications such as flap necrosis due to the obstruction of flap blood flow, or in order to protect flap blood flow, the flap is often separated thicker or smaller and causes the reconstructed ear to become bloated and swollen. For reasons such as unclear subtle structures and poor ear reconstruction results, this method is rarely reported today. In order to obtain a flap that is sufficiently large and as thin as possible, with a very secure blood flow, the flap delay method is used, which has not been reported for ear reconstruction in China or abroad. The principle of flap delay is to partially dissect the flap surgically to induce the flap to reorient the blood vessels and increase the blood supply, thus achieving easy viability of the flap transfer. The application requires attention to the following: sharp peeling of the subcutaneous layer to form a thin flap. The advantage of sharp peeling is that it reduces the breakage of the subdermal vascular network and dermal vascular network caused by blunt peeling and pulling, thus ensuring that a safe thin flap can be peeled. The thin flap is lifted, the excess fatty tissue and most of the hair follicles on the thin flap are cut away, the excess fatty tissue on the retroauricular fascia is cut away, and the upper part of the residual ear cartilage is removed, as the upper part of the residual ear cartilage interferes with the implantation of the second-stage ear stent. The fascial flap treatment mainly consists of stripping the scalp flap and ligating the thicker vessels on the postauricular fascial flap without stripping the fascial flap, paying attention to protecting the superficial temporal vessels. What are the advantages of posterior delayed flap plus autologous rib cartilage stereotaxic scaffold method of ear reconstruction? In addition to the advantages of a three-dimensional ear scaffold that can be securely formed in a single pass, this method of applying a delayed flap to solve the problem of ear scaffold coverage has the following advantages: it is possible to obtain a sufficiently large, very thin flap with blood flow security. The residual ear cartilage can be removed at the same time, providing for proper placement of the stent in the second stage. It is possible to cut most of the hair follicles at the same time, which can be applied to people with low hairlines. Safe, with few surgical complications. Requires a short rest period, even without hospitalization. Relatively low cost.