Dry bark. According to the query of Guangming Life.com, Cinnamomum cassia, also known as Yugui, Gui Mu, Yushu, Da Gui, Lagui, Pingan Tree and Cinnamomum cassia in China, is the dry bark of Cinnamomum cassia belonging to Lauraceae. Bark is fragrant and can be used as a spice. It tastes similar to cinnamon from Sri Lanka, but it is hotter, less delicious and thicker than cinnamon.