Looking for a good job is a fierce competition for graduates, so we must be careful to make our personal choices. Our family and friends may say it doesn't matter whatever we are wearing, but the workplace may not.
Some companies forbid visible tattoos (纹身), nose rings, or certain odd dress styles. A high school newspaper editor says it is unfair to judge a person by his appearance. However, as for me, I think we have to admit what we wear does convey certain messages. What we wear, including tattoos and nose rings, is an expression of our identity and our thoughts. So it makes sense that companies dress standards exist in the business world, but the main concern is often about what customers accept.
Others may argue what we dress is a matter of personal freedom, but for companies it is more about whether they can make money. Most employers do care about the personal appearances of their employees because those people represent the companies to their customers.
I am paid to be a hiring manager and to choose the people who would make the best impression on our customers. There are so many qualified candidates, so it is not wrong to refuse someone who might disappoint my customers. Even though I am open-minded, I can't expect all our customers are.
You should be responsible for yourself, if the company says your dress does not match the standards. No company should have to change to satisfy a candidate simply because he or she is unwilling to respect its standards, as long as its standards are legal.