2. The dialectical relationship between "softness" and "rigidity" is expounded. The first "softness" is "softness" and the second "softness" is "weakness", which means softness does not mean weakness. The first "gang" is powerful, "Zhi Gang" is the greatest strength, and the second "gang" is sharp-edged and even aggressive. In other words, a person who is just strong and powerful to the highest level will not be sharp-edged.