In the reign of Emperor the Second of the Qin Dynasty (221-207 B.C.), the prime minister Zhao Gao, obsessed with ambitions, was planning to usurp the throne day and night. But he did not know how many of the ministers in the court were allowed to be ordered about by him and how many of them were his opponents. So he thought out a way to test how high his prestige among the ministers was and also to find out who dared to oppose him. One day when court was held, Zhao Gao let someone bring a stag to the court and, with a broad smile on his face, he said to Emperor the Second of the Qin Dynasty:"Your Majesty, here is a fine horse Im presenting to you." Looking at the animal, Emperor the Second thought that it was obviously a stag and that it couldnt be a horse. So he said smilingly to Zhao Gao:"Mister Prime Minister, you are wrong. This is a stay. Why do you say it is a horse?" Remaining calm, Zhao Gao said:"Will your Majesty please see more clearly? This really is a horse that covers a thousand li a day." Filled with suspicion, Emperor the Second looked at the stag again and said:"How can the antlers be grown on the head of a horse?" Turning around and pointing his finger at the ministers, Zhao Gao said in a loud voice:"if our Majesty do not believe me, you can ask the ministers."