How a qi men dunjia calculator builds its board: the solar terms, the yin/yang dun split, the four layers, the chief symbol and chief door — and how to use qi men windows for scheduling, travel, launches and important conversations.
Qi Men Dun Jia ("mysterious gate, hidden jia") is a chinese metaphysics timing method: given a question and a chosen moment, the method builds a board on a 3×3 palace grid and reads which times, directions and postures support a given action. Historically consulted for campaign timing, today it is used as a planning checklist — when the method reads a window as more supportive for initiation, partnership or rest. This qi men chart guide walks through how the board is constructed, so the output becomes understandable rather than mystified.
We use the shi-jia (time-based) rotating board, with the chai-bu (split-filling) method for fixing the ju. The build order is fixed and fully reproducible:
The output reads like a timing checklist rather than a verdict. For a scheduling question, the method reads which windows sit under supportive doors and stars — the slots it frames for starting a project, publishing an announcement, or holding an important conversation. For travel, the method reads which directions the board frames as smoother. For a quieter week, it reads periods when the notes are less supportive, suggesting rest and consolidation instead of push. We present each read as a suggestion to weigh, never as an outcome claim: a window the method reads as supportive simply helps you choose your own timing more deliberately — your preparation and judgment still drive the result.
Using the calculator takes three steps. First, choose the date and the time slot you are considering — pick the actual moment the action would happen, not the moment you are asking. Second, choose your question category: scheduling, travel, launch, partnership, or an important meeting. Third, read the board: the method returns the ju (Yang or Yin Dun, and the ju number), the chief symbol and chief door, and the windows the board reads as more supportive for your category. You can compare two candidate slots side by side and keep the one that reads more clearly aligned. That is how to use qi men in practice — as a structured way to choose timing, not as a substitute for the work itself.