In the classroom, I agree with you. But most of the posts here are about what foreigners like to wear outside the class.
As to conservative, I am sure you have seen what Chinese women wear whether its cold or hot. Actually I should say how little Chinese
women wear. I come from California, and I thought I had seen it all. But even the clothes of Chinese women make me blush.

AS to overly pushy, at my last school they asked me not to wear my baseball hat. Mind you this was outside the class and I used it to shield my eyes from the sun, not to look cool. A baseball hat, I am sure, is not a sign of crass dress.