September 9th, commonly known as the Double Ninth Festival, is a traditional festival in China. The Double Ninth Festival has folk activities such as climbing high to pray, enjoying chrysanthemums in autumn, wearing dogwood, offering sacrifices to gods and ancestors, and drinking to pray for longevity. Double Ninth Festival, New Year's Eve, Tomb-Sweeping Day and July 30th are collectively called the four traditional ancestral festivals in China. The Double Ninth Festival originated from the worship of astronomical phenomena, which began in ancient times, spread in the Western Han Dynasty, and was officially designated as a folk festival in the Tang Dynasty. Since then it has been followed by successive dynasties.

The customs of the Double Ninth Festival are:

Climb mountains, enjoy autumn, enjoy chrysanthemums, enjoy dogwood, fly kites, eat Chongyang cake, drink chrysanthemum wine, and be grateful and respect the elderly. Double Ninth Festival is a traditional festival in China, which falls on the ninth day of the ninth lunar month every year. The Double Ninth Festival originated from the worship of celestial phenomena and evolved from the sacrifice after the ancient autumn harvest.

In ancient times, there was the custom of climbing on the Double Ninth Festival, so it was also called "Climbing Festival". Because the ancients worshipped mountains very much, they would climb them on the Double Ninth Festival. On the custom of appreciating chrysanthemums on the Double Ninth Festival. Because there was a chrysanthemum culture in ancient times, people thought that chrysanthemum was a natural flower, so it gradually formed a chrysanthemum culture of appreciating and praising chrysanthemums.

In addition, the Double Ninth Festival can also be called Double Ninth Festival, ancestor worship festival, climbing festival and autumn festival.