相识到相恋相爱到相老
[xiāng shī dào xiāng liàn xiāng ài dào xiāng lăo]
Describes the beautiful journey from getting acquainted to falling in love, growing deeper in love, then aging together, expressing hope for long-lasting, enduring love that spans from youth until old age. It conveys commitment, dedication, and the joy shared throughout life with another person.