Where is Li Chunchun's copybook?

Door wall. Sticking Spring Festival couplets is a custom in beginning of spring. In the Tang Dynasty, Chang 'an people often pasted calligraphy and painting on the door wall, which were called "Yichun characters" and "Yichun paintings" to express their good wishes to ward off evil spirits and eliminate disasters and welcome good luck. Beginning of spring, also known as Da Chun, is also the custom of solar terms in beginning of spring.