Xuan Kong Feng Shui is a part of San Yuan classical Feng Shui. It is considered a highly developed branch of Classical Feng Shui. The advance formulas and techniques enable practitioners to conduct a more comprehensive, in-depth analysis during their Feng Shui audits.

The Feng Shui practitioner super-imposes the natal chart of the building on the floor plan. The flying stars will be determined by when the construction of the building was completed, and the analysis begins by looking at the three factors. They are the main door, the bedroom, and the kitchen. The rest of the rooms in the house/office are audited by the practitioner.

During the audit, the practitioner will tap into as many of the timely stars as possible. Solutions that are not costly and practical will be suggested. Xuan Kong formulas and techniques are tools for the practitioner to see if the building has good Feng Shui.