Why is there no metallography?

Metallography is actually air signs, foreign countries say four phases, China says five elements, fire belongs to fire, and soil belongs to soil, which is easy to distinguish. The water phase constellation belongs to wood and aquatic wood in the five elements, while the wind phase constellation can be gold or water. Because the wind phase takes air as the element, the sky is gold, and Uranus is also known as the king star, so the wind phase Aquarius has the dual attributes of gold and water. So the wind is changeable. ...