(1) Xiao He and Cao Liu Bangtong are from Peixian County. Xiao He worked as an official in Peixian County, Cao Can as a prison rafter, and Liu Bang as a director at the rural grassroots level. They hit it off with each other and had quite a lot of contact.

(2) Although Liu Bang is only a small pavilion leader, he is a hero, making friends with all directions and having some fame in the Jianghu. When Qin Ershi came to power, there were signs of unrest everywhere. Seeing that Liu Bang was a character, Xiao and Cao both intended to get to know him, caring for him in every possible way.