No infringement. If the colors of words, graphics, letters, numbers, sounds, three-dimensional signs or their combinations that constitute a trademark are not clearly specified when applying for trademark registration, they shall be registered in black and white and protected in black and white. Where a specified color or color combination is explicitly put forward, it shall be registered and protected according to the specified color or color combination. As a trademark, letters refer to the smallest writing unit of pinyin characters or phonetic symbols, including pinyin characters and foreign letters such as English letters and Latin letters. The original Trademark Law classified a trademark consisting only of letters as word mark, while the newly revised Trademark Law of 200/kloc-0 regards letters as one of the constituent elements of a trademark, which is more practical and convenient for the trademark authorities to examine and approve trademark registration applications according to law.