Great changes unseen in a century (Chinese: 百年未有之大变局; pinyin: Bǎinián wèi yǒu zhī dà biànjú) is a term in Chinese political rhetoric which refers to geopolitical shifts in which the United States is seen as a declining power and in which the rise of populism, economic securitization, and advancing technology create an environment of uncertainty that results in both opportunities and threats for China. The term originated from political scientist Yuan Peng in 2009, and has since become a frequent aspect of foreign policy discourse by the Chinese Communist Party (CCP) and its General Secretary Xi Jinping.