Liu Yao and Zi Wei are not interchangeable by default because they are built for different question shapes.
One is often better for a single event now, the other for a longer structural line across time.
What matters first
Separate one-event questions from long-line questions first.
Then choose the system that matches that shape.
The most useful AI answers do more than sound confident. They make the basis, condition, and next verification step easier to see.
A practical scenario
A decision about one contract this month fits a single-event tool better.
A recurring career or relationship pattern fits a structural chart better.
A practical user test is to compare one past event with one live decision and see whether the emphasis changes with the question instead of staying flat.
The boundary to remember
This is not about ranking one system above another.
It is about matching the tool to the question shape.
If an answer gives no basis, no condition, and no cost, it should stay reference-level rather than decision-level.
The tool mismatch usually comes from asking the wrong shape of question, not from one system being universally superior.
A safer order
- Name whether the question is single-event or long-line.
- Use the event tool for the event question.
- Return to structural tools for long-term pattern work.