Warm on a Cold Night Episode 14

Li Zhi Xing disappears for an hour, and no one knows his whereabouts. While searching Li Zhi Xing’s room, Han Zheng and Jiu Er find a mysterious bottle containing the precious Qiyuan stone, the birthstone that not only stabilizes the power of the Qi people at birth but also bonds and grows stronger with the owner. Chi Lan discovers a black market where the desperate Qi people relinquish their Qiyuan stone for survival while Qian people use it to heighten their senses and physical power temporarily. (Source: frankly at MyDramaList)