"Where is Jiaozhi? This place is in northern Vietnam, which was very poor at the time, but it had one thing—it produced raw materials for alchemy: mercury and sulfur."
"What are these two things used for? The so-called cinnabar becomes mercury when burned, and through accumulation and transformation, it turns back into cinnabar. Cinnabar is the most crucial element in the art of alchemy, also known as mercuric sulfide. This was the key to his alchemy, which is why he requested to go to Jiaozhi as an official."
"But this person was also quite willful. On his way to take office in Jiaozhi, he passed through Guangcheng, where the governor, knowing his hobby, promised to supply him with alchemical materials."
"And guess what? He immediately regretted it, told the Emperor he wouldn't go to Jiaozhi anymore, and even directly took up residence on Luofu Mountain in Guangcheng, never leaving for the rest of his life."
