"Professionalism" is usually related to a person's knowledge, skills and work attitude in his field, rather than which language or dialect he uses. Different occasions have different language requirements. In formal occasions, especially when cross-regional and cross-cultural communication is required, standard language (such as Mandarin) is usually used so that everyone can understand clearly. This is mainly to ensure the clarity and efficiency of communication, not because the use of dialects means unprofessionalism. In fact, dialects have their own unique cultural charm and expression advantages. In appropriate situations, the use of dialects can narrow the distance between people and enhance the sense of belonging and intimacy. In some specific occasions (such as local cultural activities, internal informal communication, etc.), using dialects may make people feel more real and friendly. However, in those formal or public occasions, it is more appropriate to choose standard language for the sake of general understanding and professional image. Therefore, speaking dialects or not cannot simply judge a person's professional level. The key is to choose the most appropriate language expression according to different occasions and objects. True professionalism is reflected in the grasp of the communication object, the communication situation, and the display of knowledge and skills, rather than simple language form.