The "Chong Yang Festival", also as such known as the Double Ninth Festival, is celebrated on the ninth day of the ninth lunar month.
The festival can be traced back as early as the Warring States Period (475 – 221 BC). According to the yin/yang dichotomy which forms a basis to the Chinese world view, yin represents the elements of darkness and yang represents the opposite, brightness. The number nine is regarded as yang, so the ninth day of the ninth month is a double yang day, and people have the name "Chong Yang Festival" (Chong means "double" in Chinese). The ninth month also heralds the approach of cold winter. It is a right time when the living prepare warm clothing, and filial Chinese sons and daughters extended this for providing winter clothes for their ancestors. The Double Ninth Festival, therefore, also became an occasion to visit the graves of depart family members. Clothes made of paper would be burnt for them as offerings.
The most characteric of this festival is the climbing highly. On the Double Ninth Festival, people customarily climb nearby mountains, appreciate chrysanthemum flowers, drink chrysanthemum wine and eat double-ninth cakes. The Double Ninth Festival is also kown as the "Old Men Festival". Old people on this day are especially meant to improve their health by taking part in the activities.
The Double Ninth Festival is also a day for family reunion. It is an occasion to remember one’s ancestors, the hardships they underwent as well as the sacrifices they made. Often, family outings are organised where people search to renew their appreciation of nature, to reaffirm their love, and concern for family members and close friends.