In Zhou Dynasty, Qin Dynasty and Han Dynasty, emperors rode six horses, and princes rode four horses. After 2000, Luoyang municipal government moved to Luonan and built a square in the original city center. As soon as construction started in 2002, more than 700 Eastern Zhou tombs and more than 30 chariots and horses pits were discovered. Twenty-six cars and 68 horses were found in the pit of No.5 large chariot, of which No.2 car in the west row was a six-horse-drawn car.

In ancient times, the higher the position, the more horses there were when traveling, and the son of heaven had six horses, which decreased in turn.