Do I have to wear formal clothes for the interview?

Whether to wear a formal suit during an interview depends on the requirements of the company you are interviewing, your own ideas and the type of job you are interviewing.

Some companies explicitly require you to wear formal clothes when interviewing, so in this case, you must wear formal clothes to travel. If the company doesn't explicitly require it, it's up to you whether to wear formal clothes or not. Sometimes it's not because you have to wear a formal suit or something, but because it will make you look cleaner and neater. Therefore, the interview must be clean and tidy, natural and graceful, there is no need to wear colorful clothes, but also wear heavy makeup and so on, giving a bad first impression. So whether there is this rule or not, if you have formal clothes or something, it is better to wear formal clothes, which can show how much you value this interview.

Of course, it also depends on what job you are interviewing for. Like today's kindergarten teachers, their working objects are all children, and children like bright colors, so it is more serious to wear formal clothes in kindergarten, but dark colors are still not suitable. You can choose some bright colors, like red, yellow, blue and green.

So nothing is absolute, and there is no rule that you must wear formal clothes to the interview. Look at the content of your work and the people you face. If you are an adult, just wear a formal suit, which can show your cleanliness and attention. However, if the object is a special group like children, you should also change it in time. It doesn't matter whether you choose some bright colors or wear anything during the interview. What is important is your concern for this job and your grasp of the situation, your understanding of this job's professional knowledge and whether you have confidence in yourself.