The Yellow Emperor in the legendary era. "Guangxiang Opera Ges·Preface" by Huang Bu of the Northern Song Dynasty said: "The elephant plays the soldier's play. In the Yellow Emperor's battle, the fierce beasts are driven out to form the formation. The elephant is the hero of the beast. Therefore, the soldier's play is named after the elephant play." It is said that Shennong of the era. Nian Chang, a monk from the Yuan Dynasty, said in "Buddha's Chronicles": "Shennong used the sun, moon and stars as images, and the Prime Minister of the Tang Dynasty used chariots, horses, soldiers, soldiers and cannons as machines." The ancient chessboard was lost in time. When the chessboard was lost, people had different opinions. People believed that "the one who wins this board will win the world." Is this true? I don't know. Is the ancient chessboard waiting for the destined boy?