Legal analysis: (1) registered trademarks lack distinctive features; (2) the subject of the trademark registrant is unqualified; (3) The trademark conflicts with the legal rights previously obtained by others; (4) The trademark belongs to a sign whose use is prohibited; (5) Other reasons why the trademark is invalid.

Legal basis: Trademark Law of People's Republic of China (PRC).

Article 8 Any sign that can distinguish the commodities of natural persons, legal persons or other organizations from those of others, including words, figures, letters, numbers, three-dimensional signs, color combinations, sounds and combinations of the above elements, may apply for registration as a trademark.

Article 9 A trademark applied for registration shall have distinctive features and be easy to identify, and shall not conflict with the legal rights previously obtained by others. Trademark registrants have the right to indicate "registered trademarks" or registration marks.

Article 11 The following marks shall not be registered as trademarks: (1) Only the common name, figure and model of the commodity; (2) directly indicating only the quality, main raw materials, functions, uses, weight, quantity and other characteristics of commodities; (three) other lack of distinctive features. A trademark listed in the preceding paragraph may be registered as a trademark if it has obvious characteristics and is easy to identify after use.