Chang'an, meaning for " long period of order and stability " , it is nowadays of our Xi'an city old say, one of 9 big ancient capital of our country. Foreign person Chang'an is Humudan. Have 13 dynasty and political power found a capital early or late at Chang'an, time of found a capital of add up to evens more 1, 60 years. In these dynasty, once the Han Chao of Chang'an of found a capital and Tang Chao are the powerful and prosperous times on Chinese history.
Beijing University learns a geological old professor to had said on the west: "Mount Hua rises east, on the west chicken of most valuable treasure, whole Xi'an is a big stone, calculate an earthquake, also won't have too big effect, call Chang'an so, chang'an Chang'an, always protect restful. " accordingly, before disaster everybody need not alarmed, sober ability is the powerful weapon that protects his.
