The People’s Liberation Army Navy (PLAN) submarine force recently marked its 72nd anniversary, a milestone that underscores the rapid transformation of China's "silent service" from a rudimentary coastal defense unit to a sophisticated pillar of Beijing’s maritime strategy. At the heart of the commemorations was a submarine detachment under the Northern Theater Command, which utilized the anniversary to reinforce "Red Education" among its sailors. By centering the ceremony on the sacrifice of late commander Cai Yiqing, the PLAN seeks to bridge the gap between technological advancement and ideological steadfastness.
Cai Yiqing, who died in 2007 while attempting to rescue a comrade during a training mission, has become a potent symbol for the force. His motto, “putting the boat in one’s heart,” serves as a rallying cry for a generation of submariners operating in increasingly contested waters. For the Northern Theater Command, which oversees the strategically vital approaches to the Bohai Sea and the Yellow Sea, maintaining high morale and political reliability is as critical as the stealth of its hulls.
This emphasis on "revolutionary spirit" comes at a time when the PLAN’s submarine fleet is undergoing a massive qualitative shift. Over the last seven decades, the force has transitioned from aging Soviet-era designs to modern nuclear-powered attack submarines and ballistic missile submarines. These vessels are now venturing further into the "deep blue," projecting power beyond the First Island Chain and securing China’s second-strike nuclear capability.
However, Beijing remains acutely aware that advanced hardware is only as effective as the personnel operating it. The "immersive" ideological training described in official accounts reflects a broader push by the Central Military Commission to ensure that as the navy grows more technologically complex, its command structure remains firmly under the Communist Party’s thumb. In the claustrophobic, high-pressure environment of a submarine, the Party views ideological cohesion as the ultimate safeguard against the psychological and operational rigors of long-distance deployments.
As the fleet's tracks continue to extend toward the far seas, the official message remains clear: while the equipment is modernizing, the fundamental mission—loyalty to the Party—remains unchanged. This dual focus on technical prowess and political purity defines the current era of the PLA Navy as it challenges established maritime powers in the Indo-Pacific.