According to the relevant information, the relationship between Sun Rain and Four Seasons Mu Ge is that the bosses are all Xu Xinjian. Other than that, it doesn't matter.

Sun Rain is the world's leading leader in the utilization of solar energy, and a professional technology and service provider for the composite utilization of solar energy and air energy. As an environmental protection partner of China, the first solar thermal company of China and a well-known trademark of China, Sunrain has been devoted to the technical research, manufacturing and marketing of new energy application products such as solar energy for more than ten years. At present, Sunrain has provided solar hot water system solutions for more than 1 countries and regions around the world.