In modern Shanghai, "no matter being an official, doing business, learning and serving the people, you must make a little profit, and you should show off your clothes as a service, that is, advocating Excellence, being a servant and looking at your appearance." C

Test analysis: this question examines the ability to obtain and interpret information. The material "whether serving officials, businessmen, scholars and the people, but getting a little surplus, trying to show off their clothes" reflects that all classes in modern Shanghai attach importance to dressing up and are proud of showing off their clothes. It shows that the original concept and hierarchical concept have been impacted, and the extravagant wind is prevalent, which is in line with the material; ④ Not reflected; So choose C.