People watch a 3D printer shaping a choclate creation during the opening day of the Brussels Chocolate Fair in Brussels, capital of Belgium, on Feb. 10, 2017. (Xinhua/Gong Bing)
People watch a 3D printer shaping a choclate creation during the opening day of the Brussels Chocolate Fair in Brussels, capital of Belgium, on Feb. 10, 2017. (Xinhua/Gong Bing)