What is the metaphor of "Haitang" in poetry?

This is a poem by Chen, a famous poet in the Song Dynasty. As the saying goes, "A child's face changes three times a day in spring." Although February of the lunar calendar has entered the solar term of fright, the weather is still cold, which is the season of "early cold rain and late wind". The newly opened apricot blossoms withered in the cold wind and rain. What Chen is worried about is that the spring scenery in the garden is scared away by the cold of late spring. In the first sentence, the poet explained the weather in Baling in February, that is, the "Japanese wind", and the weather was already bad. Two sentences, a word "fear", wrote the poet's inner worries. Can all this love stand the test of cold spring? In three sentences, the word "Haitang" points out the protagonist of the whole poem. When the spring is bleak, Haitang brings spring to the garden and comfort to the poet with its full bloom. The last sentence not only shows that Begonia flowers are not afraid of the cold in spring, but also reflects the poet's unyielding personality. The begonia flowers in Joan Hinton give people hope. It is the most vivid touch of red in the cold spring, igniting the most beautiful spring in the world.