bazi-ziwei-cross

First it confirms they are the same person and the same moment

Both charts have to describe the same person at the same instant, and the run stops if that check fails. Read two charts from different moments against each other and every agreement and every contradiction it finds is fabricated.

A different year pillar is a calendar convention

The two systems start the year at different points: BaZi at 立春, Zi Wei at the first day of the first lunar month. So for anyone born between those two dates the year pillars simply differ — that is not an error, and the report says so before comparing anything.

Contradictions are stated

Each area gets a verdict: agreeing, complementary, or contradictory. Contradictions are written as they are, without averaging and without picking a side.

Two conclusions drawn from the same source are named as one piece of evidence stated twice. Where both systems derive a judgement from the same pillar it looks like two independent confirmations and is one.

No combined score

There is no defensible arithmetic between an elemental percentage and a palace arrangement, and forcing a single figure out of them erases exactly the parts of each system that should not be averaged away.

What it does not do

It does not cast charts — that is bazi-chart and ziwei-chart. No compatibility reading, no luck pillars or annual cycles, and no dated prediction.