The Double Ninth Festival is one of the traditional Chinese festivals.Every Double Ninth Festival, people choose to go outing in the mountains to breathe fresh air and enjoy the beautiful scenery of autumn. In addition to climbing, the Double Ninth Festival is also a time for people to go home and visit relatives. Family reunion is one of the very important values in traditional Chinese culture, and the Double Ninth Festival is a good opportunity for families to get together. People will write letters or call their relatives far away to express their longing for them, and they will also invite their parents and relatives to spend this special holiday.