Rhyme refers to the use of homophonic words at the end of sentences or couplets when writing poems, songs, words, etc., so that the rhyme of works is harmonious and easy to recite and remember. The last word of Silver is Yin, the last word of Happy is Xin, and the vowels of the two words are the same. These two words rhyme, so Silver can be happy every day.
There are many ways to rhyme, such as interlacing, that is, a rhyming word appears every other line and a rhyming word appears in every sentence. Double-line rhyme is a group of two sentences, and each group uses a pair of rhyming words.