央视网消息：9月3日上午，纪念中国人民抗日战争暨世界反法西斯战争胜利80周年大会在北京隆重 举行。各地群众收看大会直播，共同见证阅兵盛典，感受国家的强盛与荣光。 ...

Group 1 - The article highlights the significant role of Yu Hai, a former conductor of the PLA Military Band, in the recent military parade, marking his sixth participation in such events [1] - Over 3,000 university students formed a choir, performing classic songs from the wartime era, showcasing the spirit of the Chinese nation [1] - Yu Hai's dedication to precision in military ceremonies is emphasized, reflecting his lifelong commitment to the national anthem and military music [1] Group 2 - The article discusses a past challenge faced during the 1999 parade regarding the timing of the military band's performance, which was resolved through technical improvements rather than using recorded music [2] - The evolution of military music is noted, with the introduction of diverse and artistic compositions, such as "The Ode to the Red Flag," which marked a significant moment in 2009 [2] - The recent parade featured a blend of 15 instruments and 11 parts, symbolizing the new era of China's military strength and cultural identity [2]