Youth is the hope of the country and the nation, winning the youth will win the future. The 100-year history of the Communist Youth League is a history of always following the Party, focusing on youth, uniting youth, serving youth, and representing youth. From the perspective of theoretical logic, the ideal and belief of Marxism is the spiritual gene of the Communist Youth League leading the youth. From the perspective of historical logic, the Communist Youth League is based on the times, leading the development of youth in awakening, mobilizing, uniting and winning youth. From the perspective of practical logic, the Communist Youth League leads the development of youth to adhere to the internal unity of the "three natures", the organic unity of seeking truth from facts and upholding integrity and innovation, and the organic unity of self-innovation and self-improvement. Only by summarizing experience can we better look forward to the future. The young people led by the Communist Youth League should stick to the banner of the Party, strengthen their original mission, firmly believe in lofty ideals, insist on facing the youth, better play the role of the party’s assistant and reserve army, and be a good guide for the youth.