The second article of Gu Zhongyan's article says this: full of losses, modest benefits. Change it when you know it. If you smell it, you will be very happy. A family is not an ant, running water does not rot. Take good advice and hate evil. If the clock doesn't strike, it won't ring Good medicine tastes bitter and is good for illness, but advice when most unpleasant is good for action. There is more content, you can log in to the browser and enter the ancient and modern sages to browse.