Group 1 - The Chinese military is undergoing significant leadership changes with the investigation of high-ranking officials Zhang Youxia and Liu Zhenli for serious violations of discipline and law [2] - The Chinese Air Force's August 1st Aerobatic Team will participate in the 10th Singapore Airshow, showcasing the J-10 series aircraft [3] - The Chinese Navy's "Silk Road Ark" hospital ship has made its first stop in Uruguay, marking a milestone in military cooperation and engagement with Latin American countries [5] Group 2 - The Ministry of National Defense emphasizes the importance of military service registration as a legal obligation for eligible male citizens, framing it as a unique and honorable "rite of passage" [4] - The military service registration process is designed to assess the capability of eligible citizens for military service and to ensure the recruitment of high-quality personnel [4] - The registration can be completed online, and citizens have the option to either register for military service or simply complete the registration without immediate intent to enlist [4]