(715-70) was a friend of the illustrious Tang poet Du Fu, and served for some ten years in the northwest frontier. The ninth day of the ninth month (Double Nine, Zhong Yang Jie) is a fall holiday also known as "Elder Day" where people traditionally climb a hill to enjoy a view, visit graves, wear dogwood leaves, sip chrysanthemum wine, enjoy the chrysanthemums, sun, life, coitus.