As I said before, Cai Mao wanted to kill Liu Bei, and Liu Bei rode away on Luma. His Luma jumped off Tanxi and flew to the other side.
Dragon pony refers to Luma.
Zhao Yun, who accompanied him, disappeared from Liu Bei at the banquet and led the troops to chase after him from the West Gate in search of his master.
Iliad refers to Zhao Zilong.