Origin of Celosia cristata and Phoenix-tailed Autumn Cool

From "Zhao Lingyi Shu follows Yuan Wailang". It means that people often enjoy the cool feeling when the weather gets warmer, which usually means describing the differences between things. The head of a chicken and the tail of a phoenix are used to compare the size difference and advantages and disadvantages of items, while the gradual cooling in autumn means that it gets colder as time goes by.