Ancient people drank chrysanthemum wine on the Double Ninth Festival, and there are many explanations about its origin. When it comes to ancient times, it was created by Du Kang, and when it comes to the early Han Dynasty, it comes from the court. Double Ninth Festival is a traditional festival in China, which is celebrated on the ninth day of the ninth lunar month every year. The number of "Nine" is a positive number in the Book of Changes, and the two positive numbers of "Nine Nine" are heavy, so it is called "Chongyang"; It is also called "Double Ninth Festival", because both the date and the month conform to nine. Returning to the truth of 1999, the ancients thought that 1999 Chongyang was an auspicious day. In ancient times, there were folk customs such as climbing mountains to pray for blessings, enjoying chrysanthemums in autumn, wearing dogwood, drinking alcohol to worship ancestors and praying for longevity. So far, it has added the connotation of respecting the elderly, feasting on the day of Chongyang, and being grateful for respecting the elderly. Climbing mountains and enjoying autumn and giving thanks and respecting the elderly are two important themes of today's Double Ninth Festival.