The City of Origin naturally wouldn't meddle in the grudges between the human race and the City of Scavengers.
What the City of Origin wanted to see more was a war between Han Fei and the City of Scavengers. When the two sides were almost evenly matched, neither side would win. This was what they wanted to see.
Of course, even if the City of Origin wanted to fight instead of watching the show, so what?
Even if his primary goal was the City of Scavengers, Han Fei wasn't afraid of the City of Origin. Since he dared to fight today, he didn't expect it to be easy.
Therefore, although the An family's immortal-level powerhouse wanted the people of the An family, Han Fei didn't intend to give them to him. Especially An Bailin, he would never let him go back to his carefree life.
