Grandmasters already stand at the pinnacle of the clouds, looking down upon all living beings. Having reached the apex, what they care about most is their dignity.
If the Tian family wanted to invite another Grandmaster to mediate, and the young Grandmaster before them refused, it would be equivalent to giving no face to Grandmaster Sun.
In his fury, Grandmaster Sun would definitely come to teach this disrespectful young Grandmaster a lesson.
Chapter 671