Will the winner of the calligraphy competition be asked to re-participate?

No, calligraphy is an art of writing Chinese characters with a long history, and usually you don't need to win prizes in calligraphy competitions. China's calligraphy is a unique visual art, which was produced and developed in China culture. Chinese characters are an important factor in China's calligraphy and one of the basic elements of China culture. China's calligraphy is based on Chinese characters, which is the main symbol that distinguishes it from other kinds of calligraphy.