Han Sen conceded and decided to oblige Xie Qing King's desire. Once they exited there, they would travel to Sword-Furnace Shelter together.
For Han Sen to allow this, though, he had to have something in return. For Xie Qing King to remain at Sword-Furnace Shelter, he would have to aid Han Sen in taking down Holy-Sword Shelter.
After their discussion, Xie Qing King remained in the lake to heal. As he did, Han Sen went off on his own to search for the treasure ahead of him. When he was feeling better, Xie Qing King said he'd follow.
Han Sen was initially concerned about venturing through the strange land alone, but now that he had received his new beast soul, he was more comfortable in doing so.
With his current fitness, he could shapeshift and do battle for a good while before becoming exhausted.