The Xu people were bandits, and they didn't trust each other much. However, they had one good thing about them, and that was that they were very trustworthy. It was said that the Xu people learned this from some Bandit rules, but no one knew where they got them from. Anyway, when you did a mission with the Xu people, you didn't have to worry about them plotting against you. They would explain the mission clearly to you, and they would give you everything you deserved. You could trust them completely, but after the mission was completed, you had to be on guard against them. Because after the mission was completed, it meant that they did not have to abide by the robber's rules and could Rob you again.
That was why these people would gather together and trust each other when they were on a mission. However, they would split up almost immediately after the mission was completed because they would no longer trust each other after the mission was completed.