"BTS are those Chinese girls, right?"   
I'm tired of these people and their stupidity. Do your research first before you say anything or else you sound like an idiot.
No they are not Chinese. The "K" in K-Pop stands for  the word "Korean". Do you really think that the word "Chinese" starts with the letter "K"? 
They are not girls just because they wear makeup. When makeup was first invented, it wasn't ONLY for girls. It was for those people who wanted to cover up the dark circles under their eyes because they stayed up for to long. Stop with the toxic masculinity. Let people live the way they want to live and continue on with your boring life. 💜