Where does the "west" in the five elements mean?

The general principle of orientation in the five elements is that the east belongs to wood, the west belongs to gold, the south belongs to fire, the north belongs to water and the center belongs to earth. The west you ask can be based on the west where you were born or the west where you live, which is the principle in the transportation of the five elements. If there is no clear western standard, we should take Xi 'an, which is related to the origin and development of the five elements, as the principle to determine the orientation. In 5000, Xi 'an was the best standard for positioning China.