Once upon a time on Ambush Elephant Mountain, Pang Shengwu had occupied Hong Zhenxiang's body and appeared there to absorb the Demon Monster's blood that had merged into the earth's veins. At that time, Su Changkong had repelled Pang Shengwu and extracted the remaining drops of the Demon Monster's blood, which he then exchanged with the Xia Yan family for an opportunity to enter the Ten Thousand Soul Warrior Tomb.
If Hong Zhenxiang's body contained the blood of Demon Monsters, then perhaps by holding that bottle of blood from the same source and handing it over to those skilled in tracking lifeforces, it might be possible to locate Hong Zhenxiang's whereabouts, and thereby follow the vine to the melon.
"Good, of course you can."
Xia Yanlong did not hesitate for a moment. Originally, the Xia Yan family had purchased that bottle of Demon Monster blood only for research purposes and had not discovered any other uses for it.