The reason Duan Lingtian chose to compromise temporarily was very simple.
As long as he and Yuwen Haochen both successfully survived their tribulation and attained the level of a "Half-Step Immortal"...
By that time, let alone the fact that Yuwen Haochen no longer had the tribulation-surviving method passed down through the generations of Wandering Saint Palace Masters as a crutch, even if he did, it would no longer pose any threat to Duan Lingtian!
Chapter 2300