Purebred British Shorthair cats must not have long hair, or have hair colors other than blue-gray, and they must be solid color, and their eyes are basically yellow. Most British Shorthair blue cats follow the five short characteristics. In addition to short hair, the ears, tail, body, and limbs are all short and round. The head also has a wide face and a chubby appearance. And the more pure the breed, the brighter and glossier the hair color will be, and the stronger the bones will be. Generally speaking, as Chuanchuan cats grow older, their facial features will gradually begin to look different. At most, the hair color will be similar.