Zhao Hongyi, director of Beijing Hospital, replied: Many people are born with asymmetric alar, either because of surgery or trauma. In this case, we can completely adjust this asymmetry through surgery and an unequal design. For example, we may have hypertrophy of one alar, so when the alar shrinks during the operation, we can perform more resection on the more obvious alar side. Because the nasal septum is deviated, the shape of the nostrils on both sides is different from that of the alar, so we can completely correct the deviation of the nasal septum, let the midline be reset first, and then trim the nostrils and alar on both sides on this basis, which may be closer to symmetry. Therefore, we should make pre-judgment according to different situations, and make an operation plan in advance, so as to achieve our goal accurately in the operation and achieve a perfect result.