The biggest difference between children and adults is that children are in a constant process of growth and development until they reach adulthood, so the treatment of children’s diseases must take this into account from start to finish, i.e., the doctor’s treatment plan, the treatment method and the outcome of the treatment must reduce the impact on the child’s growth and development. This is especially true in the treatment of scoliosis in children. Modern advances in spinal surgery have expanded the treatment of scoliosis into three dimensions, i.e., coronal, sagittal and horizontal treatment of three-dimensional structures. However, this is still not enough; children have a fourth dimension, which is the growth and development of the child. This requires the pediatric spine surgeon, when treating a child with scoliosis, to take full account of the fact that the treatment must not interfere, or minimally interfere, with the child’s growth and development, in addition to correcting or controlling the deformity from a three-dimensional structural aspect. This concept is more fully reflected in the “growth bar technique”, which is well demonstrated in our clinical work. Dr. Harrington in the United States first introduced the growth rod technique in 1962, which provided the basis for its refinement, and Dr. Moe subsequently modified it for the treatment of progressively worsening scoliosis in children, calling it the “subcutaneous rod”. We have been using the bilateral growth rod technique since 2006, in addition to the original unilateral growth rod technique. The concept of the growth bar is to place a support system on both sides of the spine that corrects scoliosis and has the ability to continue to correct it with a device that provides continuous longitudinal spinal support. The growth rod system we use consists of two rods, upper and lower, connected by a Domino connection block, with extensions reserved for the two rods at the connection. The Domino block device acts as a “growth valve” here, and our experience is that the Domino block is simple, inexpensive, and easy to use. However, if the upper and lower rods are pre-curved physiological curvature, the rods will easily get stuck when passing through the Domino connecting block, and the extension rod will not be extended smoothly enough when doing the prolongation surgery later. Normally, it is reasonable to place the Domino joint block near the thoracolumbar junction, where the spine is at 0° in the sagittal position and the lengthening rods do not need to be bent too much. The support position of the ends of the growth bar system is traditionally placed at vertebral body°. The upper and lower rods and the Domino joint are placed between the paravertebral muscles to reduce skin irritation. The growth bar is called a “growth bar” because it requires that the structure of the growth bar, which is inserted into the body, be periodically opened as the child naturally grows and develops, in order to achieve consistency between the two. This periodic opening requirement is currently limited to a minor surgical procedure to open and lengthen the reserved extension site. In the future, this spreading requirement could be automatically extended by a special remote control device outside the body. However, continued research and testing of this technology is awaited. The time interval for growth rod prolongation and lengthening is recommended in the literature to be every 6 months, however, our recommendation is to prolong every 9-12 months. This is mainly due to the national situation, where it is difficult for parents of children to accept a prolongation procedure every 6 months. Firstly, such frequent surgical protocols are not acceptable in themselves, and secondly, the cost of each surgery and the cost of travel to and from the hospital are a great financial burden for the parents. Even if we extend the time interval of prolongation, there are still children who cannot come to the hospital in time for the surgery, so it is important to fully explain the pros and cons to the families of the children before the technology is introduced so that they can cooperate with the long-term treatment after receiving the surgery.