Literature Reference: 由来蚕老后，方是茧成时。—— 《三年冬随事铺设小堂寝处稍似稳暖因念衰病偶吟所怀》 Only after the silkworms grow old does the time come for cocoons to form. Source from 'Three Years in Winter' by Bai Juyi.
蚕: Traditionally referred to as the "silkworm."
老: Seasoned. Aged. Often used in reference to people, order of seniority, and certain animals or plants. It stands in contrast to "young" or "juvenile." It also serves as a respectful term for the elderly, conveying admiration and esteem.
Meaning: The aging of silkworms symbolizes maturity and harvest, signifying that hard work eventually leads to fruitful results.