What's the difference between Japanese Sanwei Line and China Third Line?

Sanweixian is a traditional Japanese stringed instrument, similar to Sanxian originated in China. It consists of two parts: a slender piano rod and a square speaker. Three-dimensional wires are usually made of silk or nylon. When playing, the player needs to pluck the strings with a plectrum made of ivory, rhinoceros horn, tortoiseshell and other materials, which is quiet and pure, simple and melodious. The Tianjin-Guangzhou three-dimensional line is the largest of the three-dimensional lines.