During the period from Hongwu to Yongle in the Ming Dynasty, a great migration of immigrants took place under the big locust tree in Hongdong, which made Hongdong the reputation of "hometown of the world and hometown of Chinese. This poster is based on the big locust tree and the land of China. It expresses that the sons and daughters of China are deeply rooted in the soil of the motherland, connected by blood, and conveys people's feelings of seeking roots and thinking.