BOLOGNA, July 20, 2016 (Xinhua) -- A teacher teaches how to make a semi-frozen "gelato cake" in the classroom of Carpigiani Gelato University in Bologna, Italy, on July 19, 2016. Carpigiani Gelato University is located in Bologna, Italy. Founded in 2003, the school organizes 400 courses in 12 locations around the world, such as Italy, China, France, USA and Brazil. (Xinhua/Jin Yu)