<p>Gui Zhi that is hot and spicy is the best quality. Ligao divided Gui Zhi into two types based on the thickness and smell; Gui Zhi and Rou Gui. He believed that one moves upward and the other downward. This is incorrect and his words shouldn&rsquo;t be trusted. Gui Zhi is called Rou Gui or Gui Xin. Gui Zhi, Rou Gui and Gui Xin refers to the same thing. For Gui Xin, the explanation by Chen Cangqi and Li Shizhen is correct.</p>
