What does the erhu "Mangpi Crossing the River Dragon" mean?

This erhu is made of aquatic python skin.

The dragon crossing the river is an aquatic python. Erhu has a sound box, which consists of a bamboo tube wrapped in snake skin. Snakeskin is usually made of python skin, but it is not as good as python skin.

Erhu is a kind of folk music in China, which consists of a piano body, strings and a bow.