One day, Li Ming with his grandpa were feeding a bird which kept in the cage when he noticed that the bird didn't happy at all. He couldn't understand why and thought the bird wherever he went that day. On her way to school, Li Ming was still thinking of the poor bird. Seeing some birds fly highly in the sky, Xiao Ming got an idea. As soon as he return home, he persuaded his grandpa set the bird free. He said,"If we love birds, we should give them free. Only by this way can we live in harmony with nature."