骑牛难下

While several children were intently fishing by the riverside, the mischievous Beibei threw a stone over. Not only did it scare away the fish that were about to bite, but the splashing water also drenched the children. Furious, they tried to catch Beibei to vent their anger, but failed. 　　 Beibei was gleefully making faces at his friends when a cow caught his attention. He quickly climbed onto it and began teasing the animal, but no matter how hard he patted, the cow refused to move. Now, it was his turn to be laughed at by his friends. Suddenly, the cow started running. Under the astonished gazes of his companions, Beibei grew proud again. However, this cow, once it started running, seemed to have no intention of stopping. Beibei began to panic.