When was China reunified when was China not unified?

China was reunified in 1949 when the People's Republic of China was established under the Communist Party, marking the end of a long period of civil war and fragmentation. Prior to that, China experienced significant disunity during the early 20th century, particularly during the warlord era in the 1920s and the Chinese Civil War from 1945 to 1949. The Republic of China, established in 1912, struggled to maintain control over the vast territory, leading to a fragmented state. Before this period of disunity, China had been unified under various dynasties, with the last imperial dynasty, the Qing, ruling until 1912.