What does it mean in the Eastern Jin Dynasty that "it's sunny and sunny, and the willow in the old house is round and bright"?

Six fish in "Li Weng Dui Yun" tells the story of Tao Yuanming in the Eastern Jin Dynasty.

Tao Yuanming, also known as Tao Qian, has a bright and cheerful personality, and privately named Mr.

Tao Yuanming has a biography of Mr. Wu, saying, "I don't know who Mr. Wu is, and I don't know his surname." There are five willows beside the house because they think they are numbered. "