Writing Practice

if I were you I'd rather write the sentence like this: Generalizing a person's character buy their appearance could be misleading. 

That is to say that someone’s taste of fashion is just a tiny part of his or her complex personality which requires a significant amount of time and effort to get familiar with. Moreover, if people only see others as the way they are wearing, they can have a wrong perception which can lead to unwanted results in building a relationship. For example, if someone met Steve Jobs for the first time, he could be misunderstood about his characteristic because he seldom wore formal clothes which suits to his position as a CEO.
On the other hand, fashion nowadays is a global trend which drives people, especially millennials, to buy and wear the same styles. Therefore, to some extent, it breaks the traditional culture in fashion followers. For instance, when the world is crazy about crop-top, a type of a short T-shirt to show off the girls’ waists, the elderly in Asian countries such as Korea, Japan, and China are very concerned about the way their children or grandchildren's wearing can lead them to sexual abuse because these fashion styles are barely accepted in the Eastern culture.

In conclusion, it is hard to tell about a person’s culture or character through their clothes because this kind of judgment could end up being wrong(I think you sould mention why this kind of judgment may end up being wrong)  look you say X can be hard because it may end up being wrong. this sounds a little weird and if you are preparing for a test like TOEFL or IELTS  i think this does not sound like clear and coherent English sentence. 

and people are likely to wear the same clothes now.

thank you for sharing your samples with us! in my mind your essay is not well structured!! and majority of your sentences are correct grammatically but stylistically they are not beautiful. there is no clear and coherent relationship between your premises and your conclusions. At the end I should say I am preparing for TOEFL test and I would be glad to share my writing samples with you so we can comment on each other's writing samples.