A single service in the Nice Classification uses the same trademark depending on the goods. According to relevant public information from the survey, single service is a type of trademark strategy, which means that in order to realize and implement the trademark strategy, a company adopts the same trademark according to the situation of the product. Trademark strategy is a strategy for enterprises to use trademarks reasonably based on the quality and characteristics of goods. That is, companies use trademarks that represent product quality and reputation to promote products, compete for the market, and protect the company's reputation and rights.