Introduction to Xi Tower: The fifth floor of Chen's Fifth Floor is called "Xi Tower". It is the last one built among the fifth floors and is also the only building among the fifth floors that faces west and faces east. Xi Tower is located between Huandu Tower and Beibang Tower. The name of the building comes from the sentence "Xi Yi Chaoyang" in Ji Kang's "On Health Preservation", which means to welcome the rising sun, and it means nothing more than missing the king and falling in love. The Xilou is five rooms wide and two rooms deep. It has a single eaves on the top of the mountain and a balcony between the Huandu Building and the Huandu Building. It was where Chen Baochen spent his later years listening to the wind and rain, watching the sun and the moon.