According to the state regulations, when using a registered trademark, a "registered trademark" or a registration mark may be marked on the commodity and its packaging, instructions or other accessories. Registration marks include remarks and so on. The use of a registered trademark shall be marked in the upper right corner or the lower right corner of the trademark. The revised implementation rules also stipulate that there are only three ways to mark a registered trademark, that is, adding four Chinese characters "A" and "Note" after the registered trademark, adding a circle to Note, C and R, and adding a circle to R. Besides, any other marking methods are not in compliance with the law. Note is in Chinese, which is obviously useless. R is popular all over the world.