1. Umbilical cord shaping: correcting bad umbilical cord shape, such as umbilical cord contraction and umbilical cord deepening (shallow) operation;

2. Umbilical cord reconstruction: The reconstructed umbilical cord is a crypt-like structure, so local cleaning is very important. The umbilical cord should be cleaned under the guidance of a doctor from 3 days before operation, and it should be kept locally dry after cleaning.