Zhong Yue cast aside his worries immediately upon hearing King Geng's words. As the former ruler, it was likely that the foundation of his rule, and thus his influence, was still intact here.
Judging from what King Geng said, he was probably going to introduce some of his men to Zhong Yue. His reasons for doing was twofold: first, he wanted to show off his power and second, he wanted to recruit Zhong Yue and the others.
Apart from Zhong Yue, there were also a few from the Prison Realm that were invited by King Geng.