2, Chongyang Festival symbolizes symbols of good luck, happiness, light, Chongyang Festival is also known as the Double Nine Festival of the Elderly Festival because the old "I Ching" in the six as the number of yin, the nine as the number of yang. Nine is a yang number, symbolizing good luck, happiness and light. September 9, the sun and the moon and Yang, the two nine overlap, so it is called Chung Yeung, also known as the heavy nine, the ancients believe that it is an auspicious day to celebrate, and from a very early stage of this festival.