The whistle is a traditional Chinese folk toy made of porcelain or pottery. The sounding toy not only provides a visual sense of beauty to children, but also excites them with high-pitched sounds. Common whistles include porcelain bird whistles and dog whistles as well as pottery beast head whistles and double-tone whistles etc.

A bird whistle is shaped like a bird and a dog whistle like a dog. The main features of these two types are the cylindrical tail, a hole at the tail tip and a big round hole on the left top. If you inject water into the whistle from the hole at the top and gently blow the whistle, it will give a sweet sound similar to bird warbling. 

A double-tone whistle has a sound hole on both the left and right sides. It gives out double tones when blown and the tones are louder and more pleasant than those of ordinary whistles.