白头到老 (白頭到老) báitóu dào lǎo
          
              báitóu dào lǎo 
              
              set phrase 
              (to live together until the) white hairs of old age; to live to a ripe old age in conjugal bliss 
              Domain: Idiom 成语
              
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                Notes: (CC-CEDICT '白頭到老')