Thanks @nu2me for the extensive information about Bazaar charity event. Yes, the event has been going for a number of years and if I remember correctly each year they invite many top stars to the event and these top stars do attend because it is for a very good cause - charity.
Going back to Shin Hye's appearance tonight, it seems from the feedback of Weibo the Chinese fans love her hair colour and many want the same now, others comment on how they were stunned on how well she carried herself like a proper star when she appeared at the red carpet. I really do think it is a matter of taste on what you prefer how she looked but I can tell you the general feedback in China is very good so let's not dwell on one fans comment. I like how her dress may look subdued on the front but when she turned round her gorgeous back was there to show.