Ba! ba! ba! zhe shi shen me che?
(Book)

Have you ever been startled by the sudden sound of a horn? Baa! Ba!" The road is so busy with cars coming and going! Walking along the busy road, surrounded by all kinds of sounds, sometimes you can hear the shrill sirens of ambulances and fire trucks, and sometimes you can hear the loud rumbling sounds of excavators and gravel trucks. Listen carefully, what other cars can sing?

In Chinese.