What's the difference between gamboge silk and Xiangyun yarn?

1. In fact, there is no difference between gamboge silk and Xiangyun yarn. Bellows silk and Xiangyun yarn refer to the same fabric.

2. Xiangyun yarn is commonly known as gamboge silk. Xiangyun yarn is a kind of yarn and silk product which is made by impregnating the coating of mulberry silk fabric with the juice of Dioscorea cirrhosa, a distinctive plant in Guangdong, and then covering it with iron-rich river mud.