What is yuyue?

As an AI language model, I am assuming that you are referring to YUYUE Medical Equipment & Supply Company. YUYUE is a Chinese company that has been operating since 1997 and is headquartered in Shanghai. The company specializes in the manufacturing and distribution of health and medical equipment. YUYUE produces a range of products, including thermometers, nebulizers, blood pressure monitors, oxygen concentrators, and respiratory products. Its products are known for their durability, reliability, and accuracy. The company has established a global network of distribution channels and has a presence in more than 120 countries. YUYUE is committed to providing high-quality medical equipment to improve people's health and wellbeing.