The real prediction of the four pillars and eight characters does not depend on what is missing from the five elements (some computer entertainment software or free online fortune tellers should not be confused with it, as entertainment things have no accuracy at all!).
Bazi analysis is a very complicated process. You cannot simply rely on counting numbers or looking at the surface to judge whether you need to supplement the five elements (metal, wood, water, fire, earth). You must comprehensively analyze what these five elements are in the destiny. What role does it play. Sometimes, the lack of certain five elements is actually a good thing! If you take supplements directly, it will have bad effects.
For example, some people intuitively see a lot of fire in their horoscopes. If there is no water, many people think that they need to replenish water. Exactly wrong. If the fire in the horoscope is strong and it is the God of Use, then this person must not replenish water. We should obey his numerology and let the fire grow stronger.
Everyone who studies Yi Studies and has a certain knowledge of Yi Studies knows that everything in the universe is inseparable from the principles of Yin and Yang and the Five Elements, whether it is something big or small, or something small and small. Nothing can be an exception. Man is inseparable from the five elements between heaven and earth. A person is a small universe, a small Tai Chi. The only criterion for testing whether a person's name is good or not is whether the name's yin-yang and five-element pros and cons, likes and taboos, are conducive to the person's five elements, likes and taboos. What is beneficial is good, and the greater the degree of benefit, the better. Those who do not benefit are not good. Because the sound of words has five elements, the lines have five elements, and the meaning also has five elements. The combination of several words forms a new five elements.
My mentor, Master Moya, said it well, everything must be people-oriented and vary from person to person. Without people, everything is empty talk. All things that are the same are one-sided, superficial and unscientific. Only in this way can we have clear goals, prominent core and common sense in everything we do. The same is true for naming, the same is true for choosing auspiciousness, and the same is true for regulating the feng shui of Yin and Yang houses.
You can read a book on the true method of four-pillar prediction and learn by yourself