Spring Festival couplets began in the Five Dynasties. Meng Changjun, a master in the last years of Shu, wrote: "Spring Festival is Qing Yu, and Spring Festival is Spring Festival. Peach symbol on Changchun. This is the first Spring Festival couplets in history. Since then, carving peach characters has evolved into writing Spring Festival couplets. Later, due to the mass production of paper, people gradually replaced red boards with paper, which was the beginning of pasting Spring Festival couplets.
(To sum up, Spring Festival couplets evolved from the custom of hanging and writing peach symbols in the ancient Spring Festival. )