Han Fei didn't have to fight for everything. For example, he could resolve the problem of the Dragon-Subduing World sending troops to the Sword God World with Zhao Xianglong. The effect would be better, and he could get an ally for himself.
Of course, their alliance wasn't very strong at the moment, but Han Fei only needed them to wait and see. It wasn't the time to choose a side yet, but when it was time to choose a side, it wouldn't be up to the Dragon-Subduing World.
After leaving the Dragon-Subduing World, Han Fei didn't leave immediately. Two of the four Heavenly Palaces that surrounded the four palaces of the Sword God were gone, and there were only the Supreme Clearness World and the Golden Crow World left.
As far as he knew, Xuan Qingzi from the Supreme Clearness Worlde should be guarding the Heavenly Palace, but he didn't know if there was a third Sky Opener in the Supreme Clearness World.