Once a QiMen chart is cast, the first job is locating what is wrong on it. Our rule layer recognises six harms, ordered by severity: 击刑 → 入墓 → 庚 → 白虎 → 门迫 → 空亡, with a harm on a stem always outranking one on a palace.

击刑 — conflict and attrition: the main force is entangled and morale collapses.

入墓 — entombment: falling into a trap, losing all sense of direction.

庚 — obstruction: the commander beheaded; resistance and opposition.

白虎 — sudden danger: the violent, arriving abruptly.

门迫 — pressure: the door controls the palace, so even an auspicious door turns its good into bad.

空亡 — void: the palace is hollow, and the matter falls through.

We are explicit about this layer, because it decides how much weight to give us:

入墓 and 空亡 (day void, hour void) come straight from the engine — they are part of the cast itself.

门迫, 击刑, 庚 and 白虎 are not computed by the engine; they are derived by our own rule layer. 击刑 follows from the 旬首 branch being punished by the palace branch (for example 甲子戊 in Zhen-3, where 子 punishes 卯); 门迫 is judged from the element relation between door and palace.

Saying so matters: if our conclusion differs from another service, you know which layer the disagreement lives in — the casting, or the harm rules. Blurring the two is the most common dishonesty in this field.

What you get is not a verdict of good or ill fortune but an actionable list: which palace carries which harm, what that harm looks like, what to move out (灭象), what to place (布阵), and when to do it.

One hard constraint is worth stating up front: something can only be placed into a palace carrying no harm at all. How many clean palaces the chart has therefore caps how many usable options the plan can contain — and sometimes the honest answer is that this moment has none, which we will say rather than assembling a layout anyway.

That is the difference between RM88 and RM38: the RM38 reading tells you what the chart says; the RM88 takes the next step and tells you what to do about it.

Casting is free, the harm distribution and its meanings are free, and the engine's raw output can be expanded — you can see which palace carries which harm without paying.

The RM88 buys the remedy plan itself: what to move, what to place, when to act, and which palace and sign each choice rests on. Diagnosis is free; the plan is priced. That is where the line sits.