O-leg correction is now about one leg 1-20000 yuan, and the hospitalization time is not too long. Doctors in Beijing Shengji Orthopedic Hospital (formerly Beijing Osteomyelitis Hospital) said that they used minimally invasive Ilizarov technique for surgery, and they could get out of bed three days after surgery, take out stitches two weeks later, then go home, and then go back to the hospital to take out the external fixator in about two and a half months.