The Netherworld Crystal Stone is extremely important to Jing Yan. If he could secure a spot to enter the Yellow Spring Cave, he could independently strive to obtain the Netherworld Crystal Stone within the cave.
There are only nine spots available for the advanced entrance into the Yellow Spring Cave. These nine spots are allocated through a competition of netherworld points among the Four Great Forces. Under normal circumstances, Jing Yan would never be able to secure a spot to enter the Yellow Spring Cave, so he can only resolve this through a form of employment fees.
War God Li Feng saw that Jing Yan was serious and was not angered by it, but he felt that Jing Yan was a bit excessive. As the War God of the Ancient Land of Morning Light, he personally came to negotiate over the employment, but Jing Yan wanted a spot to enter the Yellow Spring Cave.
