愿我十八岁所爱之人是八十岁伴我之人
[yuàn wŏ shí bā suì suŏ ài zhī rén shì bā shí suì bàn wŏ zhī rén]
Wishing 'May the One I Loved at Eighteen Be My Companion Until Eighty,' conveying the hope that first true love will remain forever, emphasizing faithfulness and lifelong commitment in love from youth till old age.