The Shou Gong Sha is a traditional Chinese cultural symbol that represents a woman's chastity and purity. In ancient times, women would dot the Shou Gong Sha on their arms before marriage or getting married to show that they were still virgins. The jellyfish Yinji may have found her tattoo before she found her child and learned of the child's birth through this tattoo.

Thus, the Jellyfish Yinji may have found out about the tattoo and confirmed the child's birth through this tattoo after she found the child.