Despite the only way to determine a Xuè shòu is by tasting their blood, Zhiyuan's treatments to YuYan made Li FuJin guess that he might be a Xuè shòu after finding out about her mixed blood.
Though he wondered if Zhiyuan was the reason why YuYan has a mixed blood, the suspicious identity of YuYan made Li FuJin believe that it was Mo YuMin's doing.
Henceforth, even though he has an oath that a Xuè shòu is one of his enemies, Li FuJin disregarded the thought of killing Zhiyuan for YuYan sake.
Moreover, since Li FuJin doesn't know much about a Xuè shòu, having Zhiyuan around her made him feel a bit relieved since he is worried about YuYan who has a mixed blood.
Nevertheless, he still doesn't want for Zhiyuan to touch Yu Yan, but he can only leave her under Zhiyuan's care whenever he leaves to get his unknown business done.
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