circumstances cause morals to change, acting differently in different circumstances, if they are right in one situation but not in the other. But there are three things that we must consider an action: the situation, the action, and the goal. For example, in china's new year, China people who live in a different country will want to come back to their home country and willing to pay ahigher price for the air ticket, which is why the price comes up. However, for other people who just want to travel to different countries, they also must pay very high because of the busy season. Conscience is the only thing for people to decide what is wrong and what is right (Kellenberger, J, 1979). In this case, China people think that it is right to pay a higher price than usual to come back to their home country, and people from other countries think that this is wrong to pay that price. That is why different cultural will make people have different thought about one thing. Lastly, utilitarianism is the last theory I want to discuss in my industry issue. This is still about higher the price when people need it, but we can think about it in a different direction.