Chinese clothing does not necessarily represent classicality, just like a suit, it should belong to the west or be defined as professional clothing. Professional wear also depends on the industry. If you mean office and business, I think Zhongshan suit is a good professional dress for men, and for women, I think it is also good to use traditional cloth buttons and small collars in the middle, which is not very classical but also more formal. I believe it can definitely replace a suit if you insist.