Zhang Xuguang (front) introduces a piece of his calligraphy at the headquarters of the United Nations Educational, Scientific and Cultural Organization (UNESCO) in Paris, France, on Dec 11, 2017. The Aspiring to Peace - Zhang Xuguang's Cursive Calligraphy Exhibition kicked off here on Monday. About 50 pieces of Chinese calligraphy of Zhang Xuguang greet the visitors till Dec 16. [Photo/Xinhua]