In this chapter, we learn that crystals are found in extreme regions of the world, but they are also found in places that are covered with ice and snow. For example, in the ice-covered city of Xi'an, we find a young pharmacist. The pharmacist tells the young man that the ice city is unstable lately, and that he should be careful about venturing out into the ice fields to collect medicine. The young pharmacist is shocked to find that there are no pharmacist guilds in the city. He asks the pharmacist where he can find the medicines he needs to collect, and the pharmacist tells him that there is only one more medicine that he can collect, but he cannot find it in the market. When the pharmacist asks if anyone is there, the pharmacist says that it is not. He then tells the pharmacist that the pharmacist has brought in the medicine to suppress a fire poison in the pharmacist's body. This is a fire based poison, so the pharmacist must have brought the medicine in order to suppress the poison in his body