The Double Ninth Festival, also known as Chongyang Festival, is a traditional Chinese festival celebrated on the 9th day of the 9th lunar month. It is an important festival for Chinese people, particularly for the elderly.

On this day, people usually engage in various activities to celebrate the festival and show love and respect for the elders. One common tradition is to climb mountains. It is believed that climbing a high mountain can help one get rid of bad luck and bring good fortune. Therefore, families or groups of friends often organize hiking trips to celebrate the festival. They climb mountains, enjoy the beautiful autumn scenery, and have a picnic at the mountaintop.

Another popular tradition is to eat Chongyang cake, also known as "flower cake" or "cockroach cake". The cake is made with different ingredients such as nuts, sesame, and sugar, and it is usually shaped like a flower. It is said that eating Chongyang cake can bring good luck and protect against evil spirits.

In addition to climbing mountains and eating Chongyang cake, people also wear cornel to celebrate the Double Ninth Festival. Cornel is believed to have the power to ward off evil spirits and protect people from diseases. Therefore, people wear cornel twigs or make them into decorations to hang on doors or windows.

Furthermore, the Double Ninth Festival is also a time to visit and spend time with elderly family members. People often bring gifts or send greetings to show their love and respect to the elders. It is a way to express gratitude for their guidance and wisdom throughout the years.

Overall, the Double Ninth Festival is a special occasion for Chinese people to celebrate and honor the elderly. It is a time for family gatherings, outdoor activities, and expressions of love and respect. Through these traditions, people hope to bring good fortune, happiness, and longevity to the elderly and everyone celebrating the festival.