There is a fundamental difference between yellow sauce and soybean paste! There is a difference between yellow sauce and soybean paste! Like Beijing's, it's mostly yellow sauce and sweet noodle sauce! And most of the north is soybean sauce! Some southern regions have no yellow sauce or soybean sauce! In fact, according to the business school textbooks and professional books, there are noodles sauce and yellow sauce! Because the raw material and production method of yellow sauce is simple, mostly flour! Soybean paste is only found in certain regions, but there are limitations! I hope it can help you! Oh.