The allusion of "Spring Mud" comes from the poem "Although Yu Lang has a swift horse, he is afraid of spring mud".

At a concert on 1997, Yu Chengqing did an experiment on the stage, which proved that his music didn't need the support of fans. He wrote his name on a piece of cardboard, and let all fans step on his name together, stepping on the cardboard of Chunni to express his disdain and anger at some song charts, which became an allusion to Chunni.