The difference between Feng Shui master and Yin Yang master

Generally speaking, it is almost the same, because Feng Shui not only looks at Yang Zhai but also Yin Zhai, and Feng Shui masters have their own complete theoretical system. For example, Ba Zhai laid nine planets with the song of "Great Tour Year", and divided the good and bad luck by Dongsi Zhai and Xisi Zhai. On the basis of New Year's Day tray, Kong Xuan discharged the tray according to the "Three Yuan Nine Yun", combined with the tray sitting on Bushan, and then judged the good or ill luck according to the head of Lu 'an. But the teacher of Yin and Yang is not like this. Many of them have no theory and are unclear. Many of them are mixed with witchcraft and even superstition. For example, spells and symbols, why do you want this, don't do that, and the explanation is not clear.