The four basic characteristics that a trademark should have are distinctiveness, commerciality, value and exclusivity. 1. Significance. It is distinguished from signs that are descriptive, publicly known and public, and from signs of other people's goods or services, thereby making it easier for consumers to identify. 2. Commerciality. Commerciality means that a trademark is a sign used in commercial activities, such as traffic signs and safety signs. Although safety signs are also signs, they do not have the nature of a trademark because they are not signs used in commercial activities. 3. Value. A trademark represents the quality of goods and services produced or operated by the trademark owner, as well as corporate reputation and image. The trademark owner makes the trademark valuable and increases the added value of the goods through the creativity, design, application for registration, advertising and use of the trademark. . . 4. Exclusiveness. Proprietary means that the trademark is used by a specific enterprise. Although some signs are also used in commercial activities, they are not used by a specific enterprise and cannot distinguish the source of the goods, so they are not trademarks. For example, the highly toxic mark on pesticide products, the moisture-proof mark on precision instruments, etc., although they are marks used in commercial activities, are not trademarks. Because these marks are common to enterprises, they also do not have the function of distinguishing the source of goods.