Breast reconstruction surgery is mainly categorized into immediate and deferred reconstruction according to the timing of the surgery. Immediate Breast Reconstruction Immediate breast reconstruction means that breast reconstruction is performed at the same time as the removal of the breast tumor. Advantages include: 1) removal and reconstruction in one go, reducing hospitalization time and cost; 2) no psychological pain of losing the breast; 3) better shape of reconstructed breast; 4) no delay in subsequent adjuvant treatment, and no increase in the risk of local recurrence. Often suitable for skin-sparing mastectomy patients, the surgery leaves enough breast skin for immediate reconstruction, and this autologous skin has the most natural look and feel. Deferred Breast Reconstruction Deferred breast reconstruction refers to reconstructive surgery after the removal of the breast tumor and completion of adjuvant therapy. However scar formation can cause the skin to stiffen and contract, which will disrupt the shape of the breast. Breast reconstruction surgery is mainly categorized into immediate and deferred reconstruction according to the timing of the surgery. On the first day of the forum, two simultaneous surgeries were performed, one for immediate free rectus abdominis flap breast reconstruction and the other for deferred free rectus abdominis flap reconstruction. Participants were able to visualize the advantages and disadvantages of these two surgical timings through the video demonstration of the surgeries. Virtually all patients are potential candidates for immediate breast reconstruction. The most common reasons for the need for deferred breast reconstruction are patients who require postoperative radiation therapy, which is a relative contraindication to immediate reconstruction, or those who have lost the opportunity for immediate reconstruction at the time of their first surgery for a variety of reasons. Several reconstruction techniques are commonly used, including autologous tissue reconstruction (free rectus abdominis flap breast reconstruction), prosthetic reconstruction (expander replacement prosthesis), and nipple reconstruction techniques, among others. Free rectus abdominis flap breast reconstruction Free rectus abdominis flap breast reconstruction is based on deep infra-abdominal blood vessels, which are micro-anastomosed to dorsal thoracic or internal mammary blood vessels, usually using 9-0 sutures or mechanical suture devices of the same size, which ensures a reliable blood supply to the flap, reduces the traumatic effects of the surgery, and allows for a more rapid postoperative recovery. The use of free muscle flaps as a complication of microvascular anastomosis increases the likelihood of total flap necrosis, but this likelihood is low, 3% or less, and decreases with increasing surgeon experience. Prosthetic reconstruction Prosthetic reconstruction, in which the tumor is excised and then expanded, followed by removal of the expander and placement of a permanent graft, is a relatively simple procedure and is by far the most common form of breast reconstruction in Europe and the United States. Common complications include infection, hematoma, localized protrusion, medical collapse, and contracture of the implant, which can lead to unnatural firmness of the breast and, in more severe cases, distortion of the implant’s shape. The incidence of complications is low (<10%) in non-radiotherapy patients who undergo a combination of skin expansion with an expander and implantation of a prosthesis for breast reconstruction. Nipple Reconstruction Nipple reconstruction, with the nipple-areola complex, is the focal point of breast shape and symmetry. Nipple reconstruction accomplishes a complete breast, and scars become relatively less visible as the nipple becomes the primary visual focus. The time to perform this procedure is 2 to 3 months after the completion or end of chemotherapy. Usually trilobal flaps, C-V flaps, star flaps, etc. are used. Different flaps have their own advantages and disadvantages, while symmetrical position, height, width and pigmentation are the ultimate goals of nipple areola reconstruction. Scar contraction leads to loss of areolar projection, and thus to achieve symmetry surgeons usually strive for an immediate postoperative projection that is twice the height of the contralateral areolar projection. The percentage of breast reconstruction in mainland China is less than 5%. On the one hand, patients themselves are more afraid of cancer, which leads to their usual fear of talking about cancer, and there is not enough publicity and education for patients and their family members, who think that complete excision is the only means of treatment, and are unwilling to undertake, or even consider, reconstructive surgery, thus losing the opportunity for reconstruction. On the other hand, at present, many specialized hospitals or general hospitals are still lacking in the technical mastery of breast reconstruction surgery, and the cooperation with plastic surgery is not close enough to provide medical services of breast reconstruction and plastic surgery to most patients. Of course, there is also a lack of auxiliary materials for breast reconstruction in China (low availability of equipment resources, incomplete specifications of prostheses, etc.) and economic reasons, which all contribute to the low percentage of breast reconstruction in China. As the level of diagnosis and comprehensive treatment continues to improve, surgical oncology is no longer satisfied with simple tumor resection. It has become a new development trend that how to help patients to recover form and function, greatly improve the quality of postoperative life and regain confidence. It is believed that with the help of this conference, through good communication, learning and exchange, more breast surgeons will open up their eyes, learn and master the relevant theories and practical operation details of breast reconstruction.