Combined natal charts：Rules and reading
A combined reading calculates several systems independently for one person, then compares themes and differences. Choose two to seven among Western astrology, Human Design, numerology, Vedic astrology, BaZi, Nine Star Ki and Zi Wei. Their symbols do not become one universal chart.
Foundations and calculation
Each system retains its engine version, settings and results. A common analysis date does not imply common year boundaries, zodiac or timing layers. Name numbers still need a confirmed Latin spelling; another system cannot fill missing name data.
Worked example
BaZi resource themes and astrological communication themes may inform a question about collaboration, but a wealth star is not Venus. Uncertain birth time remains uncertain for time-dependent fields; matching descriptions elsewhere cannot rectify it.
Reading and judgment
Read each chart’s facts first, then compare one question. Attribute common themes to their separate fields and retain the conditions behind differences. Do not decide a conclusion by counting how many systems appear to agree.
Common mistakes
Several systems using the same input are not independent empirical confirmations. Similar wording does not prove greater accuracy. Avoid invented cross-system scores, universal energy values and personality ranks.