Zhang Xuguang (Front) introduces a piece of his calligraphy at the United Nations Educational, Scientific and Cultural Organization (UNESCO)'s headquarters 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]