Legal analysis: (1) It is composed of words alone. (2) It is composed of letters alone. (3) a trademark composed of numbers alone. (4) a trademark composed of graphics alone. (5) A combined trademark can be a combination of any two or more elements of characters, numbers, letters and graphics. (6) use three-dimensional signs and color combinations to register trademarks.

legal basis: article 8 of the trademark law of the people's Republic of China, any sign that can distinguish the goods of natural persons, legal persons or other organizations from the goods of others, including words, figures, letters, numbers, three-dimensional signs, color combinations and sounds, and the combination of the above elements, can apply for registration as a trademark.