Before diving into chart calculation, it helps to grasp the basic structure of Bazi. The "Four Pillars" refer to the Year Pillar, Month Pillar, Day Pillar, and Hour Pillar. Each pillar consists of one Heavenly Stem and one Earthly Branch, totaling eight characters — hence the name "Bazi" (eight characters). There are ten Heavenly Stems: Jia, Yi, Bing, Ding, Wu, Ji, Geng, Xin, Ren, Gui. The twelve Earthly Branches are: Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai. The Stems and Branches pair up to form a 60-cycle system known as the Sexagenary Cycle. The Heavenly Stem in the Day Pillar is called the "Day Master" or "Self Element," representing the person themselves — it is the core of any natal chart analysis. Getting familiar with these basic symbols is the first step to understanding any free chart output, and it makes further learning much smoother.

The easiest way to self-study Bazi is to use a free online chart calculator. The process is straightforward: first, gather accurate birth data — the year, month, and day in the Gregorian (or lunar) calendar, plus the exact birth hour. Then select a reputable free Bazi website or app, enter this information, and it will automatically generate your natal chart. One important thing to note: Bazi divides months by solar terms (jieqi), not by the first day of the Gregorian or lunar month. Quality free chart tools automatically handle solar term conversions and true solar time adjustments. When choosing a free calculator, look for one that displays the Ten Gods, hidden stems, and Major Luck Cycles — the more complete the information, the better for your future learning and cross-referencing. This helps you avoid errors caused by less accurate tools.

Generating the chart is only the first step; learning to read it is the real focus. Once you have your chart, start by identifying the Day Master — which Heavenly Stem represents you — and determine its Five Element (Wood, Fire, Earth, Metal, Water) nature. Next, observe the distribution and strength of the Five Elements across the four pillars to see whether your chart is "strong" or "weak" — this affects which elements are favorable for you. Then you can explore the Ten Gods, such as Direct Officer, Indirect Wealth, and Eating God, which represent different relationships and life aspects. Also pay attention to the Major Luck Cycles, which show the trends in different life stages. Beginners don't need to jump to conclusions — try generating charts for friends and family, compare them, build hands-on experience, and gradually develop your own interpretation logic.