This book profoundly discusses the historical background, development priorities and development strategies of the high-quality economic and social development achieved by China from ten aspects, namely, understanding the new transformation of contradictions; grasping the new requirements of development, and thoroughly understanding the connotation of the era of high-quality economic development; building a modern economic system; achieving high-quality development, and leading high-quality economic development with new ideas and theories; building a modern financial system compatible with high-quality economic development; high-quality economic development and international metropolis construction in Shanghai; the impact of the Sino-US trade war on high-quality development and its countermeasures; the confidence and new initiatives for high-quality economic development in China; coordinating pandemic prevention and control with high-quality economic development; and achieving high-quality development amid the close-integration between China’s and world’s economy.