Core Viewpoint - The Northern Theater Navy has initiated a new wave of military training at the beginning of the year, focusing on enhancing joint operational capabilities through integrated command systems [1] Group 1: Military Training Activities - Naval vessels such as Nanchang, Xining, and Weifang have set sail to conduct maritime training in the Yellow Sea [1] - The training emphasizes system-based exercises and aims to deepen the collaborative combat capabilities of naval formations [1] Group 2: Operational Focus - The training is designed to refine hard skills in joint maritime operations [1] - The emphasis on an integrated command system indicates a strategic shift towards more coordinated and effective naval operations [1]