泰永长征：公司固态断路器的示范项目有鄂尔多斯内蒙古某中学建设项目等

Group 1 - The core viewpoint of the article is that Taiyong Changzheng (002927) has provided information about its solid-state circuit breaker demonstration projects in response to investor inquiries [1] - The demonstration projects include a construction project for a certain middle school in Ordos, a ship DC distribution system project at a certain university in Wuhan, and a certain 800V DC system experimental station project [1] - These demonstration projects collectively account for a small proportion of the company's revenue [1]