What did Chang Xia say in ancient times?

Long summer is also called Xia Meng. Long summer is the seventh of the 24 solar terms and the first in summer. The long summer heralds the change of seasons and the official start of summer.

Chang Xia said that saying goodbye to spring is the beginning of summer. In the long summer season, only the area south of Fuzhou-Nanling line in China enters the real midsummer of "the trees grow dark in summer and the balcony reflects into the pond".