It means that Haitang is as white as a pear, and its charm is comparable to plum blossom, but it is smart and chic.
The specific original text is as follows:
Half-rolled curtains cover the door, and the ice is ground into earth jade as a basin.
Steal a pear for three cents and borrow a plum blossom for a soul.
The moon cave fairy sews robes, and the woman who always wipes crow marks in my heart in autumn.
Who is shy and silent? I'm tired of leaning against the west wind at night.
The first sentence describes Bai Haitang's "white" with the white of pear stone, emphasizing the clearness of "white", and the second sentence gives Bai Haitang the spirit of being aloof from things and standing proudly in the world with the soul of plum blossom; Stealing and borrowing skillfully use personification techniques; The word "stealing" is a derogatory term, with novel imagination, dexterity and novelty, and full of interest, which highlights Bai Haitang's cleanliness and shyness, and is gentle and charming.
"Borrowing" is novel, smart and elegant, which highlights the fragrant soul and attractive fragrance of Bai Haitang. When the two words are combined together, personification is skillfully used, and the appearance and rhyme are seen. Poetry uses flowers to describe people, which implicitly shows the poet's lofty and ethereal quality.