Why can't toilet ground is higher than the bedroom

Some friends when decorate toilet, like a basin of the build by laying bricks or stones in the bathroom, basin stage one or two steps above ground, and then embedded in the tub basin stage, to be honest, this pattern is very beautiful, but it is best not to toilet set by using the pattern in the bedroom, because according to the principle of traditional Chinese home reading, the ground of toilet not higher than the ground of the bedroom, especially the position of the bath can not have a high above the feeling.Five elements theory argues that water is the downflow, belong to embellish, under the moist water have lived for a long time in bedroom, prone to disease of endocrine system.If you really like this embedded tub, it can be placed in another alienation bedroom far inside toilet.