Double Ninth Festival is also called "Mountain-climbing Festival".[File photo]

People like to climb heights (mountains) on this festival, so Double Ninth Festival is also called "Mountain-climbing Festival". The 9th lunar month, with clear autumn sky and bracing air, is a good time for sightseeing. An outing lover, who stands on a height looking afar in the month, will have a panoramic view of a blue sky with pale clouds and dark green mountains, which makes him feel carefree and joyful. So people, both ancient and present, love to go sightseeing this month. People in the Western Han Dynasty (206 BC-25 AC) liked to ascend a height in the suburbs of Chang’an (the then national capital and present Xi’an) on the 9th day of the month to enjoy sceneries, the activity being known as height ascending; people, in the Three Kingdoms period (220-265) and the Jin Dynasty (265-420), even more liked the activity to feast their eyes on the autumn country view; sightseers in the Chang’an on the day, a man-made tourist attraction with the Qu’jiang Pool, the Ci’en Temple and the Wild Goose Pagoda to its southwest; the Ming Dynasty (1368-1644) emperors liked to ascend the Wanshou Hill in Beijing to mark the day; and the Qing Dynasty (1616-1911) emperors chose to ascend, on the day, the man-built hills in the imperial garden in Beijing. It is really refreshing to climb mountains and enjoy the beauty of nature at this bright and clear time in autumn. Apart from expelling bad luck and disasters, climbing mounting also indicates "climbing to a higher position", and it is also an important reason why ancient people pay much attention about this custom. Another reason that climbing mountains are valued by people, especially by the elderly is that is has a meaning of "climb to a longevous life". Also for this reason people believe that climbing mountains can make people live a more longevous life.