Dovetail joint:
On the front, the head of Papilio is slightly square, which looks like a thin and reduced version of the ancient square head. Viewed from the side, its big bones and small bones are arranged in an arc shape, with convex sides and concave middle, resembling the tail of a swallow. At the beginning of the Ming Dynasty, the tail of the dovetail was inclined at a large angle, but now the appearance on the market has converged a lot, making it more comfortable to play with.
Fishtail:
The shape is just the opposite of the dovetail, and the side faces are also arranged in an arc, but the difference is that the two sides of the fish tail are shorter than the middle, that is, the shape is concave outside and convex inside. The head shape on the front is rounder and fuller than the dovetail, and the player who prefers the feel is more suitable to choose the fishtail.