Abstract: It is true that "what is the determined thing" is the embodiment of the general and special combination of ideas. The "determined thing" is the "order parameter", which is dialectical and historical practice. In the category of quantity, the "determined thing" is in the ring structure of majority (many contradictions) and the single (major contradiction), which makes most of the main contradictions. In the category of quality, the "determined thing" is in the circular structure of the main side and the second important side of contradiction. "In the face of reality" is actually the beginning and end of the "contradiction decision", and the development of the whole thing is the "inexistent body" of the second important side of contradiction, which is the negative of reality, signifying "hope" and "pursuit". The argument of On Contradiction is that external inevitability is the objective reality that causes change not to be transferred by the will of man, but it is determined by the fact that things are developing in any direction. In the process of self-determination of this order parameter, all external factors unite to form "meaningful creation" actions. The "determined thing" is the main force in the system, the main force of contradiction, and the main important side of things.