What do the three vertical lines on the head of a little yellow duck in the WeChat emoticon bag mean?

Shame. In the WeChat emoticon pack, the three vertical lines on the head of a little yellow duck are the classic emoticon pack of WeChat little yellow duck, which means shame. The expressions of three little yellow ducks are images that often appear in front of children all over the world. They can heal people's hearts and relax people's mood. They don't discriminate against anyone. They have no connotation. They represent depressed people who are used to comfort and encouragement.