The China-Laos Railway links the land, and at the same time brings hope for patients in the villages along the railway line. Chen Bingwu, a doctor from the railway project department, provides free medical services for the villagers, alleviating the patients' sufferings with his sincerity and exquisite medical skills. He is loved by the villagers, and known as the warm-hearted Chinese doctor who "receives only smiles but no money".