Your teacher is really avoiding the question and testing on a question that a student has no right to speak. If you change to Huaiyang cuisine, it will test the teacher's level. For example, if a student makes a mistake in his slides and other students find out, the teacher must be able to distinguish right from wrong and not prevaricate. Talking about foreign things all day is a sign that teachers are worthless. Dare he speak in front of foreign students?