Workers sort porcelain pieces in Jingdezhen, east China's Jiangxi Province, April 12, 2019. In preparation for the Jingdezhen porcelain exhibition of the mid-15th century of the Ming Dynasty to be held in Shanghai in June, technicians are working on the restoration of porcelain fragments unearthed from of royal kilns. A total of 170 pieces of fine porcelain from royal kilns will meet the audience in the exhibition. (Xinhua/Zhou Mi)