A: A trademark refers to a symbol mark composed of words, graphics or their combinations, which is used on commodities to distinguish the same or similar commodities produced by different producers. Its identification object is general commodities. The so-called service trademark refers to a special mark composed of words, graphics or their combinations, which is used in service projects to distinguish similar service projects provided by different operators. The main differences between them are as follows: ① The identification objects are different. Commodity trademarks are used for tangible goods and service trademarks are used for intangible services. ② In different fields of use, commodity trademarks mainly exist in industries that produce, process, select and sell commodities, while service trademarks exist in tertiary industries such as service industries. (3) In different ways of use, commodity trademarks can be directly used on commodities, while service trademarks cannot be attached to intangible services, but can only be expressed through the service behavior of service project providers and used through advertisements. (4) The publicity effect is different. Commodity trademarks can be widely spread with the circulation of commodities, but service trademarks can't. Therefore, service trademarks are not as effective as commodity trademarks in indicating service sources and ensuring service quality. It should be distinguished from the aspects of identification object, use field, use mode and publicity effect.