Nanjing is one of China's most historic cities. It is one of the four great ancient capitals of the nation, along with Beijing, Chang'an (Xi'an) and Luoyang. Its name means southern capital (Nan=south, Jing=capital), while the name of the current capital, Beijing means Northern capital. Nanjing was the national capital at various times, however generally for periods of no more than a few decades. Upon the establishment of the People's Republic of China, the national capital was moved permanently to Beijing, where it had been for most of the previous five centuries.