Children paint the wall of a building at an art zone in Dashu Township of Chun'an County in Hangzhou, east China's Zhejiang Province, April 25, 2019. Artists and art students have been creating artwork in recent days in an art zone transformed from old factory buildings with a total area of over 10,000 square meters. The art zone will be open to public in early May. (Xinhua/Xu Yu)