Francesco Roviello from Italy paints at Zhangjiajie UNESCO Global Geopark at Wulingyuan District of Zhangjiajie City, central China's Hunan Province, April 6, 2018. About 21 artists coming from Italy took part in a cultural event at the geopark which is known for its quartzose sandstone landform. This geopark is one of the geoparks in China that have already been chosen by UNESCO on its World Network of Geoparks. (Xinhua/Wu Yongbing)