Summary: If you are interested in Chinese knots, this ball would be definitely a attraction to you. It is basically a finger weaving method. And your left thumb and little finger along with right hands play a significant role in tying knots below.
If you have an interest in Japanese joinery or joinery in general, then I would like to point you to an article series by John Bullar. Bullar is writing this article series about Japanese join… - My Saws And Jigs