The diagnosis and treatment described in this book is based on the combination of Ilizarov technique, Paley¿s principle and Qinsihe Natural Reconstruction theory. It covers all kinds of lower limb deformities, ranging from congenital deformities to acquired deformities, the sequelae of Poliomyelitis, Cerebral Palsy, Spina Bifida Sequelae, Traumatic Sequelae, Charcot-Marie-Tooth disease, Osteogenesis Imperfecta and Congenital Pseudarthrosis Tibia, etc. There are also lots of clinical tips and tricks such as how to reduce radiation exposure during orthopaedic surgeries, how to correct multiple limb deformities in one stage, how to balance the dynamic muscle in complex foot and ankle deformities, and how to successfully accomplish the surgery of