Needles were able to be controlled by spiritual energy, and they could become great hidden weapons. Not to mention, they could also be used during healing, and Luo Xiao had long since had a certain wish to learn how to heal others.
After going through a childhood where he could not experience the world outside, he wished to help others regain their freedom. However, he was currently focusing on alchemy, and while pills could help with many things, they were not omnipotent.
So, his wish was that when he managed to gain a thorough understanding of the basics of alchemy, then he would try to gain a brief understanding of the physician's profession.
Luo Xiao was very pleased to hear Jiang Yao's mention of the needles, and he happily turned around and planted a loud and happy kiss on the demon's cheek, before he hurriedly looked down on the stage once more.