How old is Yan Zhenqing in Yan's three poems?

Yan Zhenqing lived to be 93 years old. His name generally refers to 33 painters and calligraphers who called themselves "Yan Zhenqing" since the Song Dynasty, and the earliest one was Yan Zhenqing (658-733). Yan Zhenqing's poems represent the literature and art in the prosperous Tang Dynasty, among which three poems are beautiful: (1) Dreaming about the past: dreaming about the past and looking back at the empty valley. On the banks of this ancient world, there is no life and death in the mirror of Yaochi. (2) "There is a store in Tianmen No.9 Middle School": There is a store in Tianmen No.9 Middle School, and cigarettes and flowers are separated. Remember Gu Yue in the cave? Who can take it off? (3) "communication should be less hate": communication should be less hate, and rivers are going downhill. On a cold autumn night, the West Building is better.