Summary: In China, 一线城市 (yīxiàn chéngshì), or “first-tier cities,” refers to the nation's most developed and influential urban centers, namely Beijing, Shanghai, Guangzhou, and Shenzhen. This term is crucial for understanding modern China, as it signifies not just a location but a hub of economic power, immense job opportunities, cultural innovation, and intense competition. For anyone learning Chinese or about China, grasping the concept of city tiers is key to understanding social aspirations, economic trends, and the “Chinese Dream.”