United States and Sino-U.S. relations in the 21st century 并列题名：United States and Sino-U.S. relations in the 21st century 并列题名：New landscape in SINO-U.S. relations in the early 21st century New landscape in SINO-U.S. relations in the early 21st century China and globalization in the 21st century 并列题名：China and globalization in the 21st century Characteristics and prospects of modernization in the 21st century Angler's adventures in the 21st century The Role of the United Nations in the 21st Century Study of U.S. military operations in the 21st century