The font of calligraphy itself is not copyrighted, but it needs to be recognized. Without the approval of many people, it does not exist. About the copyright of fonts: The so-called copyright is the exclusive intellectual property. If fonts are popular, there will be no copyright dispute.
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.