China, officially the People's Republic of China, is a country in East Asia. It is the world's most populous country, with a population of more than 1.4 billion. China spans five geographical time zones and borders 14 countries, the second most of any country in the world after Russia. Covering an area of approximately 9.6 million square kilometers (3,700,000 sq mi), it is the world's third or fourth largest country. The country consists of 23 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions. The national capital is Beijing, and the most populous city and financial center is Shanghai.