"The years are like songs" and "the feast of reunion".
1. "Years Are Like a Song": This name emphasizes the passage of time and the review of history. It is suitable for recalling and celebrating past work experiences and achievements, such as the 50th anniversary dinner of the 73rd Work Registration.
2. "Reunion Feast": This name emphasizes the atmosphere of reunion and joy. It is suitable for spending happy time with colleagues, recalling the past and looking forward to the future, such as the 50th anniversary of the 73rd Work Registration Celebrate dinner.