BaZi: Calculate Your Four Pillars Step by Step

Use the user's birth year-month-day-hour and gender to complete the chart calculation. Execute in this order:

Year pillar - Heavenly Stem formula + Earthly Branch formula, adjusted with Lichun as the boundary
Month pillar - Earthly Branch divided by solar terms; the Heavenly Stem uses the Five Tigers Month-Starting formula
Day pillar - reference-day calculation, precise to the day
Hour pillar - the twelve double-hours correspond to Earthly Branches; the Heavenly Stem uses the Five Rats Hour-Starting formula
Hidden stems - look up the main qi, middle qi, and residual qi
Ten Gods - based on the Day Master's Heavenly Stem, calculate for the other seven stems (including hidden stems)
Five Elements statistics - count the distribution of all Heavenly Stems and Earthly Branch main qi, and assess strength/weakness
Na Yin Five Elements - look up the 30 Na Yin groups to get the four pillars' Na Yin
Spirit stars - look up Tian Yi Gui Ren, Yi Ma, Tao Hua, Hua Gai, Kong Wang, and other main spirit stars
Major luck cycles - determine forward/backward, calculate the starting age, and list 8 major luck cycles' Gan-Zhi

After each step, show the derivation process in the report so the user can check.