Whether a person who speaks a dialect appears unprofessional in a formal setting depends mainly on the nature of the setting and the person being communicated with. In some formal settings, such as business negotiations, academic conferences, or official document exchanges, using a standard language (such as Mandarin) is often seen as more professional because it ensures accurate communication and widespread understanding of information. But this does not mean that people who speak a dialect are unprofessional. Sometimes, dialects can express local culture and emotions, and may also appear more intimate and natural in specific social situations. Moreover, in some places, dialects may be part of the local cultural literacy and can enhance the intimacy of communication. In general, professionalism in formal settings has more to do with the content, method, and audience acceptance of communication, rather than just the choice of language. Using appropriate language expressions, combined with the occasion and the object, is the key to communication.