A Natal/Star Chart is simply a snapshot of the cosmos at the time your Home/Building was constructed; some call it a Cosmic Map. The Chart is used to create Balance and Harmony in your Home/Office/Building.
No matter which area of Feng Shui you practice, it all comes down to the Natal/Star Chart which is based on the Luo Shu Trail. Creating the “Chart” takes lots of trial and error; if the calculations are incorrect the mapping of the “Chi” flow is wrong. If the Chart is wrong then the Remedies will also be wrong. I would always advise that any person taking Feng Shui seriously needs to learn the “Luo Shu Trail”.