In our western countries, most people use to know very little about the Chinese music and instrument making tradition.
At the website of chinese maker Shan Jiang, I’ve found this picture of a Gu Pin Hu, a Chinese folk bass. It was made by his father, Mr.Yun Kai Jiang, who taught violin making in the Conservatory of Music in Shen Yang.
This bass instrument has rather the size of a cello, but a very deep rib depth. It also has a flap on it’s right side – an adjustable soundhole?