diu in pinyin is thulium which is a rare metal element. Makes me wonder if it is perhaps acrylic?
The picture on the label could of course just be a picture for the brand not the content of the yarn
It could also be a cotton?
The way to see if it is acrylic or a natural fiber is to do a burn test. Take a small piece of the yarn, over a sink set it alight using a match. If it melts and has a plastic type smell, doesn't naturally go out of its own accord then it is acrylic. If it burns but smells like burned hair and the fire goes out naturally, with the ends curling then it is a natural animal hair fiber.
Worth looking on the net for a detailed description of how each fiber reacts under a burn test and give it a go
Takes only a minute or two