The couple shares a deep bond and supports each other through thick and thin.
Tips
culture
The 军民鱼水情 ('army-people fish-water bond') is a canonical PRC revolutionary trope - used in propaganda, songs, and film about PLA-civilian relations. Outside that context, it's a general metaphor for inseparable intimacy.
memory
Fish can't live without water. The metaphor makes the dependency mutual and essential - not just closeness, but survival-level reliance.
