Some babies have a floating thumb on one thumb and a normal thumb on the other, some babies have floating thumbs on both hands, sometimes one hand is type IIIB or IIIC and the other hand is type IV, sometimes both hands are type IIIB or IIIC, etc. In the early days, we usually operated on both thumbs separately because it was too stressful for the baby to be operated on both sides at the same time, but now we basically do them together. Whether we do both bunions separately or together has to do with the way the surgery is done. If we take the metatarsal bones, we have to take two metatarsal bones from one foot for bilateral bunions, or we have to take half a metatarsal bone from each foot, which is more traumatizing for babies, so we usually do them separately. Nowadays, the surgical method we use is half metacarpal bone graft reconstruction. The bilateral floating bunion takes part of the second metacarpal bone of both feet without moving the feet, and this method has less impact on the donor area, and there is no problem to do it at the same time.