Explanation: Once formed, no change. With the static. " Source: "History of Ming Li Zhi a" husband-day trip to degrees in many hands and people of limited intelligence ... ... but the thought of people past and present together, heel upgrading things, perhaps that line. It can become difficult for the law also. " Examples: As mentioned silk industry, before the invention of the production and manufacturing methods are good, but ~, the total improvement do not know. ★ Sun "Livelihood" Fourth Lecture
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With "static." "History of Ming Li Zhi One": "Cardiff-day trip to degrees in many hands and people of limited intelligence combined ancient and modern people ... ... but the mind, heel upgrading things, perhaps that line. It can not be as difficult for the law also." SUN Zhongshan "Livelihood" Fourth Lecture: "As mentioned silk industry, before the invention of the production and manufacturing methods are good, but one into a hard, do not know the total improvement."