The agreement had been settled without any opposition as both parties were assured to attain equal benefits from one another. However, the next course of action wasn't looking as effortless as the first one.
Inducing Grandmaster Yang to revoke Gong Hei's seat as his first direct disciple to set him free from the invisible shackles binding him from the Academy.
He was no Death. Unlike that wild rodent, he can't simply go in and out of the island whenever pleases—vexing as it may.
Grandmaster Wei treats Death like his own, Grandmaster Yang treats him and his junior disciples as his subordinates.
Frankly, Gong Hei wasn't interested in being a direct disciple in the beginning. What provoked him to chase after it was when he found out that Death was Grandmaster Wei's first disciple.
And coincidentally, Grandmaster Wei's rival, Grandmaster Yang, doesn't have a direct disciple yet at that time. It was fairly easy to gain the old bat's interest.