diff --git a/artboards/integration.jsx b/artboards/integration.jsx
index fb0df51..1dd0395 100644
--- a/artboards/integration.jsx
+++ b/artboards/integration.jsx
@@ -364,7 +364,8 @@ const ArtboardIntegration = () => {
                         ) : <span style={{color:"var(--fg-3)"}}>—</span>}
                       </td>
                       <td className="mono" style={{color:"var(--fg-2)", fontSize:11}}>
-                        {fmtDate(v.onboardAt)}
+                        {/* 完全未对接的车辆从未接入，不显示接入时间 */}
+                        {flagged ? <span style={{color:"var(--fg-3)"}}>—</span> : fmtDate(v.onboardAt)}
                       </td>
                       <td>
                         <button className="btn" style={{height:24, padding:"0 8px", fontSize:11}} onClick={() => location.hash = "#/detail"}>