What does it mean to soak in the rain at night?

In the evening, Begonia was bathed in rain for the first time, which means that Begonia flowers were moistened by drizzle for the first time last night. From the poem A Flower Laughs by Tang Yin, a poet in the Ming Dynasty. Original poem: Begonia rained last night, and several flowers were light and charming. The beautiful woman stood up from the blue room and folded her makeup in front of the mirror. Tang Yin's word "Bohu" is the same as the word "fear", and the number is six, such as laity, Taohuaan mage, Lu's, Zen-free fairy, etc., and Wu of Wuxian is a neighbor.