【正确答案】正确答案： The Double Ninth Festival, also known as Height Ascending Festival, falls on the ninth day of the ninth lunar month. On this day, the traditional diet is Double Ninth cake, chrysanthemum wine and chrysanthemum tea. Climbing, inserting cornel and enjoying the beauty of chrysanthemum are important customs of the Double Ninth Festival. These activities can increase the festive atmosphere, and it is said that misfortune and disasters can be avoided through these activities. Today, the custom of inserting cornel on the Double Ninth Festival has vanished, but many people still tend to climb and enjoy the beauty of chrysanthemum and the beauty of autumn on this day. In some places of China, there is also a custom of worshiping ancestors on Double Ninth Festival. With such a long history, the Double Ninth Festival has been included in the first batch of national intangible cultural heritages.