I don’t understand it very well, but as far as I know the transliteration itself is not different. . . There are not many types. . . It's just that David Craig is black and Tao Zhe is yellow. The two people's vocal characteristics are different: R&B itself is more suitable for black people, and it is original to black people. David's voice is softer and richer, and his transposition is more casual; Tao Zhe's voice is relatively thin but somewhat clear, and his transposition is relatively deliberate, but his skills are still second to none among the Chinese. In fact, transposition is not a professional music term. It is not included in formal music training. You can practice it by yourself and experience it bit by bit in your life.