It means this product is patented. If a product has applied for a patent number, it means that it enjoys legal patent rights. Anyone who uses it without permission is an infringement of its patent rights and needs to bear infringement liability. This product is protected by a national patent. If someone imitates it, it is an infringement and you can sue them for compensation. Jingdezhen ceramics began in the Han Dynasty. During the Five Dynasties, Jingdezhen established its position as the earliest place to fire white porcelain in the south and its high achievements in white porcelain, thus breaking the monopoly of celadon in the south and forming the "Southern Qinghaibei" "White" pattern.