What Liu Bang was worried about was Hou Fenfang. He didn't want the governors of the world to tear the big fellow he had worked so hard to build. Sean doesn't want this to happen, so he won't help Han Xin in the sense of national justice. Han Xin is different from other kings. Although Han Xin was loyal at that time, relying on Han Xin's ability, once a crisis occurred, the consequences would be unimaginable.
Why didn't Liu Bang kill Han Xin himself? This reason is nothing more than fear of disturbing other kings. If Liu Bang hadn't killed Han Xin at that time, it would have been difficult for Han Xin to return to Qi and want to kill Han Xin. Besides, at that time, the world was at the beginning, and once other kings were disturbed, it would trigger another war, which was really something that Liu Bang did not want to see. Liu Bang acquiesced in Lv Hou's killing of Han Xin, knowing that Lv Hou was no match for Han Xin, and let Xiao He plan together.
And Xiao He naturally know the stakes, understand whether Han Xin is loyal or have second thoughts, Han Xin this capable person, as long as the undead is a threat. Then we must nip in the bud. We would rather fail in Han Xin than think of this big country. Sean, as a visionary counselor, naturally understood Liu Bang's mind, and Sean knew in his heart that the death of a Han Xin could protect the security of Dahan countries, so it was natural to do so.