China, officially the People's Republic of China, is a sovereign state located in East Asia, recognized globally as one of the world's oldest continuous civilizations and a major political, economic, and cultural power. 背景 Geographically situated between the Pacific Ocean and the Tibetan Plateau, China spans approximately 9.6 million square kilometers, making it one of the largest countries by land area. Its diverse topography includes vast plains, high mountains, deserts, and extensive coastlines, which have historically shaped agricultural development, trade routes, and regional diversity....