Duiyi is the most extensive, vivid, refined and economical literature and art of China culture in social life. Couplets, also known as couplets, are an art form with national characteristics that China people love to see and hear. They are the perfect combination of language art, calligraphy art and decorative art, and are the customary names of couplets among the people. Couplets are also related to metrical poems, emphasizing duality. The third and fourth sentences, the fifth and sixth sentences are similar to two couplets. Therefore, couplets are known as "poems among poems", which are wonderful works in China's language and literature and treasures in China's traditional culture. There have always been different opinions on the time when couplets came into being. According to the traditional view, the earliest couplets began in the Five Dynasties, and Meng Chang, a master of the post-Shu generation, wrote "Welcome the New Year and Celebrate Changchun" as the earliest couplets in China. Couplets are also called couplets, couplets, and couplets posted on posts are called couplets.