This is a heartbreaking moment when a man named Li Gang broke down in tears after he finished a marathon race in Nanchang City, east China's Jiangxi Province on November 11, with his dead son's photo in hand. Li and his son had planned to run this year's #marathon together, but his son was accidentally drowned during the summer holiday. To deliver his promise to his son, Li signed up and finished the race. #dad #son

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