Chengdu is a major megacity and a significant metropolis, serving as the capital of Sichuan Province in southwestern China. It is recognized as one of the most populous urban centers in the country, with a resident population exceeding 21 million people as of 2025. Covering an administrative area of over 14,000 square kilometers, the city functions as a vital economic, cultural, and transportation hub for the region. Its status as a "New First-Tier City" highlights its rapid development and influence, placing it alongside other traditional Chinese megacities like Beijing and Shanghai. With a history spanning over 2,300 years, Chengdu successfully blends its ancient heritage with modern infrastructure, making it a primary center for commerce, tourism, and international trade in western China.