a: as a trademark, the 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 trademarks composed only of letters as word mark, while the newly revised Trademark Law in 21 regarded letters as one of the constituent elements of trademarks, which is more practical and convenient for the trademark authorities to examine and approve trademark registration applications according to law. Numbers, as the constituent elements of trademarks, are also the new provisions of the new Trademark Law in 21. Numbers that constitute a trademark can be Arabic numerals or Chinese capital numerals. As a three-dimensional mark that constitutes a trademark, it can also be called a three-dimensional mark, which is a three-dimensional mark with length, width and height. The trademark logo composed of three-dimensional logo is called three-dimensional trademark, which is different from the trademark pattern that we usually see on a plane, but appears in a three-dimensional material form, which may appear in the shape of goods, or in containers or other places of goods. Adding provisions on the registration and protection of three-dimensional trademarks is a new addition to the newly revised Trademark Law in 21, which will make the trademark protection system in China more perfect. Color combination as a trademark element alone is also a new addition in the new Trademark Law. Unique and novel color combination can not only give people a sense of beauty, but also be significant, which can play a role in indicating products or sources, and can also play a role in distinguishing producers, operators or service providers. The above-mentioned six types of trademark elements can be registered as trademarks alone, or any combination of two or more of these elements, the same or different, must comply with the relevant provisions of Articles 8 and 9 of the Trademark Law. As the colors of words, figures, letters, numbers, three-dimensional signs or their combinations that constitute trademarks, if the specified color requirements are not explicitly put forward when applying for trademark registration, they are all registered in black and white colors and protected in black and white colors. If the specified color or color combination is explicitly put forward, it will be registered and protected according to the specified color or color combination.