A trademark is a mark used to distinguish one operator's brand or service from other operators' goods or services. Only after a trademark is registered can it have the exclusive right to use a registered trademark. Famous trademarks in the international market are often registered in many countries. There is a difference between "registered trademark" and "unregistered trademark" in China. A registered trademark is a trademark that is protected by law after being registered by the relevant government departments, while an unregistered trademark needs to be marked and well-known after being used. China's trademark law stipulates that trademarks approved and registered by the Trademark Office, including commodity trademarks, service trademarks, collective trademarks and certification trademarks, enjoy the exclusive right to use trademarks and are protected by law. If they are well-known trademarks, they will be protected by cross-category laws. According to the Trademark Law of the People's Republic of China, signs that can distinguish one's own goods or services from those of others include words, graphics, letters, numbers, sounds, three-dimensional signs and color combinations, as well as combinations of the above elements. The query method is also very simple. Baidu searches for "Trademark Office" and enters the trademark name in the trademark comprehensive query. If the query is obtained, it proves that it has been registered, and if there is no record, it is not registered. Legal basis: Article 3 of the Trademark Law of the People's Republic of China is a registered trademark, including commodity trademark, service trademark, collective trademark and certification trademark; Trademark registrants enjoy the exclusive right to use trademarks and are protected by law.