For babies with floating thumbs, we have two main objectives to achieve through surgery: to improve the function and appearance of the thumb. To achieve these two objectives, four key points are essential: 1. Choice of surgical method (Semi-metacarpal bone graft reconstruction – SMRT floating bunion reconstruction, which preserves the baby’s thumb and reconstructs the first metacarpal bone by taking a portion of bone from the second metacarpal bone of the baby, which does not affect the growth and development of the second metacarpal bone; no metatarsal bone needs to be taken from the baby’s foot; no casting and relatively simple care). 2. Experienced hand surgeons (over 20 years of experience). 3. (No need to put a cast on the baby’s foot, relatively simple care) 2. Experienced hand surgeon (more than 20 years of medical practice) 3. Safe and reliable anesthesia (expert in cardiac anesthesia for infants and young children) 4. Post-operative rehabilitation exercises (teach parents to give their babies recovery exercises, keep in touch with parents and pay close attention to their baby’s post-operative functional recovery exercises)