diff --git a/en/docs/reference/maintainer/bi-engine.md b/en/docs/reference/maintainer/bi-engine.md
index 9874ae4..27a61b3 100644
--- a/en/docs/reference/maintainer/bi-engine.md
+++ b/en/docs/reference/maintainer/bi-engine.md
@@ -107,6 +107,16 @@ code change needed to add or modify them.
 
 ## KPI subsystem
 
+> **Disambiguation.** The FROUNT home page also shows a card titled
+> "**KPI监控**" (KPI Monitor) — that is **not** the same thing as
+> what's documented here. The home-page card is an open-task counter
+> served by `BusinessModelCenterController.getModelCenter`; it reads
+> `gdsmodule.bUnTask` / `sUnType`, has no targets / scoring / charts,
+> and is misleadingly named. See
+> [The KPI Work Center in runtime.md](runtime.md#the-kpi-work-center-front-end-home-dashboard).
+> The `kpi*` table family below is the *actual* per-employee
+> performance-scoring layer.
+
 `kpi*` is a **per-employee performance-scoring** layer separate from
 the chart rendering. The shape: