三年悸动五年之痛七年之痒
        
            [sān nián jì dòng wŭ nián zhī tòng qī nián zhī yăng]
        
        
            Thrilled for Three Years, Hurting for Five Years, itching after Seven Years. This describes the various stages of a relationship: the initial excitement, followed by pain, and then a lack of interest over time.