A few days ago, a young girl limped into the orthopaedic foot and ankle disease clinic of Zhejiang Provincial People’s hospital. Her upper body was wrapped in a heavy knee down jacket and a mask, while her lower body was wearing ankle exposed pants. When the doctor saw the clothes of the patient’s upper body in “cold winter” and feet in “summer”, he knew seven or eight points in his heart. In cold days, more and more patients come to the orthopedic foot and ankle disease clinic of the hospita...