What are the five words of China's five thousand-year preface?

China's calligraphy is an ancient art of writing Chinese characters. Calligraphy has always exuded artistic charm, from Oracle Bone Inscriptions, Yunnan, to Dazhuan, Xiaozhuan and Lishu, and then to cursive script, regular script and running script in the Eastern Han Dynasty and Wei and Jin Dynasties. China's calligraphy is a unique visual art, and Chinese characters are an important factor in China's calligraphy, because China's calligraphy was produced and developed in China culture, and Chinese characters are one of the basic elements of China culture. Relying on Chinese characters is the main symbol that distinguishes China's calligraphy from other kinds of calligraphy.