In the turmoil of the early 1930s, as Japanese aggression swept across China, a young musician composed a melody that would stir a nation. At only 23, Nie Er created The March of the Volunteers – a song of courage, hope and unity that later became China's national anthem. CGTN reporter Yang Jinghao retraces his footsteps in Kunming, exploring the places that shaped his life and showing how his spirit continues to resonate today.