I have no access to the details of all products available in China, including Cyan Slate. However, assuming that Cyan Slate is a type of natural stone, it can be used outdoors for various applications such as paving, landscaping, cladding, and roofing. However, the suitability of Cyan Slate for outdoor use would depend on various factors such as its hardness, porosity, durability, and slip resistance, among others. It is advisable to consult with a professional stone supplier or installer to determine whether Cyan Slate is suitable for the specific outdoor application.