An one-month-old hippo cub comes out of a cage with its mother "Lu Yan" in Jinan Zoo of Jinan city, capital of east China's Shandong Province, July 11, 2017. The little hippo which was born on June 9 in Jinan Zoo met with the public on Tuesday. It's the 10th cub of the female hippo "Lu Yan".(Xinhua/Lyu Chuanquan)