Visitors pose for photos with a welcoming board on the opening day of the Houston Livestock Show and Rodeo in Houston, Texas, the United States, on Feb. 25, 2019. The Houston Livestock Show and Rodeo, also called RodeoHouston or abbreviated HLSR, is the largest livestock exhibition and rodeo in the world. It includes one of the richest regular-season professional rodeo events. (Xinhua/Yi-Chin Lee)