长相厮守到白头需要多勇敢
[zhăng xiāng sī shŏu dào bái tóu xū yào duō yŏng găn]
It takes great courage to stay together until white-haired old age. It contemplates on commitment and devotion in long-term relationships - acknowledging that sustaining deep connections involves considerable effort, facing adversity side-by-side.