One happy day, Tongtong sang a strange song while walking, "Ding, ding! Dong, dong! Di, di! Da, da! Poop, poop! La, la! Du, du! Lu, lu!" Hearing this, his curious friends began to follow Tongtong one by one.
The Panda Tongtong series of picture books uses stories and colorful illustrations to teach children about Chinese culture.