Genghis Khan was originally called Genghis Khan, and later called Genghis Khan. The real meaning of "Cheng" refers to the sea. It is impossible to see the real sea on the prairie, so people on the prairie especially yearn for the mysterious, surging and endless sea. They used to call all the lakes on the grassland Haizi, such as Hasuhai and Daihai, which are not too big lakes. Genghis Khan's ambition can also be seen from the title of "Cheng". He wants to sweep the space and have the whole world.