God, do friends on the third floor really know what a formal dress is? How can they mislead the landlord? In fact, there are two "ladies' rooms" and "Gloria". Formal dress refers to formal public relations occasions, generally referring to the western assembly of leather shoes. Wearing formal dress pays attention to the "three-color principle" ~ ~ that is, you can't wear more than three colors at most ~ ~ `, and it is best to pay attention to the same color of socks and leather shoes or pants. I suggest you attend the lecture on social etiquette given by Professor Jin from Renmin University of China. You see, he speaks well, and the lecture room invited him to speak!