Speaking of respecting the elderly, the first Chinese festival that comes to your mind might be the traditional Double Ninth Festival. The festival is celebrated the ninth day of the ninth month of the Chinese lunar calendar every year. The festival (know) as Chongyang Festival, too.
One of the main (tradition) during the festival is mountain climbing. People get together with their families and friends to hike up mountains to "stand high and see far". This has been a Chinese tradition since ancient times.
Traditionally, the festival is also a time to drink chrysanthemum wine(菊花酒), eat Chongyang cakes wear cornels(茱萸). The chrysanthemum wine is not only a delicious drink but also believed to be good for health. People also believe that cornels can help to drive out the bad spirits and bring good luck.
However, the Double Ninth Festival is not just a time for climbing mountains and (enjoy) the autumn scenery. More importantly, it is a time to show respect for the elderly.
As nine is the (big) single-digit(个位) number, and its pronunciation sounds the same as "long" in Chinese, the festival shows people's wish for all the elderly to live a long and (health) life. So the day is also seen as a chance (care) for and express thanks to the elderly. Families usually come together and show respect and love for their elder relatives. People may also visit (they) grandparents or elderly neighbors, bringing gifts and sharing meals.
The Double Ninth Festival is of great (important) in Chinese traditional culture. It reminds us not only the beauty of autumn but also the value of the elderly.