When it comes to social justice, most people answer is equal opportunity. When talking about equal opportunity, people's minds often appear on the starting line in the arena. As long as everyone stands on the same starting line, competition is fair, so the final result Whatever it is, is fair. The question is: what conditions must be met before we can stand on the same starting line? Furthermore, when we use the metaphor of starting line to think about justice, what kind of moral imagination is behind it? What is the main point of this passage? ['The concept of equal opportunity, not just staying on the same starting line.', 'Equal opportunity can only be achieved by standing on the same starting line.', 'Equality of opportunity is an effort to ensure a fair starting point and allow competitors to play freely.', 'The so-called starting point fairness is to wipe out all the differences between competitors.']