Occult cleft of the lip, also known as micro-mini-cleft of the lip, falls under the category of incomplete cleft of the lip on conventional split.Yuzuriha and Mulliken classified unilateral occult cleft of the lip into Minorform, Microform and Mini-Microform according to the degree of deformity. The classification was based on the height difference from the peak of the labrum to the midpoint of the base of the nasal tubercle bilaterally. Those with a height difference >3 mm were classified as Minorform labial clefts; those with a height difference <3 mm< span=""> were classified as Microform labial clefts; and those with a height difference of 0 were classified as Mini-Microform labial clefts. This classification does not take into account the horizontal difference between the peak point of the affected cleft and the peak point of the healthy cleft, so it would be more accurate to say that the height difference between the peak point of the healthy cleft and the distance from the peak point of the healthy cleft to the midpoint of the base of the nasal column. In general, Minorform cleft lip can be corrected by rotation-advancement and combined with single-arm Z reshaping of the red lip, but the incision and the extent of the surgery can be reduced compared to incomplete cleft lip. Microform labral tears are repaired with a single-arm Z-retrograph and attention is paid to the reconstruction of the human midsection. It is important to emphasize that when designing a single-arm Z reshaping, the transverse incision of the peak of the cleft on the descending healthy side should be as close to the white line as possible, preferably not >1mm, in order to make this scar more concealed. Mini-Microform lip occlusion, because the bilateral labial peaks are located in the same plane, can be closed directly with a shuttle incision. For children with relatively obvious nasal deformity, the nasal deformity is repaired by using a shuttle incision at the base of the nose or the “V-Y” advancement method. Reconstruction of the orbicularis oris muscle can be done through a vestibular mucosal muscle incision or after the patient grows up, the specific situation of the depressed mid-ridge can be confirmed and then surgically repaired. In clinical practice, the parents of the patients often discuss with the surgeon the question of “internal” or “external” incision. In fact, the concept of “internal” or “external” is not exact. Perhaps, they think “external incision” is the regular cleft lip repair surgery, and “small external incision” is a small Z-shaped reshaping or shuttle incision, then what is “internal incision”, I still don’t quite understand. I don’t understand it too well. Because a simple incision of the oral mucosa of the red lip (excluding the dry mucosa, which is the “external incision”) cannot solve the problem of cleft lip, even if the orbicularis oris muscle is repaired through the path of the oral mucosa incision. However, it is necessary to understand the “meaning of language” of the patient in order to communicate between the doctor and the patient. Personally, I believe that the repair of cleft lip is like the second-stage revision surgery, which is designed according to the characteristics of the deformity, but is not as variable as the second-stage revision. The deformity of cleft lip has its own regularity, so the design should follow certain rules.