姜桂之性

Explanation: Ginger and cinnamon longer the more spicy. Metaphor of the older more upright character. 　　Source: "Tun Fu Yan Chuan Sung," I state the nature of Jiang Gui, to the old more spicy. " 　　Examples: Zhang Yan was building in the sweet-scented osmanthus, all taste the best wins of the flowers, but not to taste ginger sauce. ~, The old and the more spicy, Yi Yu Zhong section of the gas, Xun is true also. ("Fu" volume IV)