[Pinyin]
Hulan circle
[Interpretation]
Suddenly: describe openness; Cheerfulness: Cheerfulness. From dark and narrow to spacious and bright. Metaphor suddenly realized a truth.
[source]
Qian's Peach Blossom Garden: "Only when you are very narrow at first can you understand people. The number of complex lines is ten steps, and it suddenly becomes clear. "
[example]
After the Chinese teacher explained a passage of ancient Chinese word for word, we suddenly understood the meaning of the article.