One family of the Chinese nation, with one heart and one mind, built the Chinese dream together. "The Chinese nation works together with one heart and one mind to build the Chinese dream" is a vivid portrayal of China's national unity and progress in the new era, and it is also a distinctive feature of promoting national work through innovation in the new era. The cause of national unity and progress in the new era mainly refers to the cause of unity, mutual assistance, common development and harmonious coexistence of all ethnic groups in China under the new era background.