On this vast steppe in northwestern China where people move with the seasons, accessing medical care was once a daunting challenge. For half a century, Dr. Uhas Sulayman has braved blizzards and rugged trails across Xinjiang's steppes, treating over 100,000 nomadic patients and inspiring a new generation to follow in his footsteps. Journey to China's northwestern frontier with CGTN's Gong Ming to meet a legendary grassland doctor whose protective footsteps have never stopped — even in retirement.