Here is an often quoted poem about Double Ninth Festival.

《九月九日憶山東兄弟》 王維

獨在異鄉為異客，

每逢佳節倍思親，

遙知兄弟登高處，

遍插茱萸少一人。

Double Ninth, Missing My Shantong Brothers

- Wang Wei (Tang Dynasty)

Alone, a stranger in a strange land,

Every holiday the homesickness doubles.

Far away my brothers have sent word:

They have gathered on mountain tops,

They are going around inserting zhuyi branches,

They are missing one person.