diff --git a/Src/Dlhis.Basic/Organization/Services/Implements/GainfoUpdateService.cs b/Src/Dlhis.Basic/Organization/Services/Implements/GainfoUpdateService.cs
index 9cef8d54..1a1cf5fe 100644
--- a/Src/Dlhis.Basic/Organization/Services/Implements/GainfoUpdateService.cs
+++ b/Src/Dlhis.Basic/Organization/Services/Implements/GainfoUpdateService.cs
@@ -509,11 +509,12 @@ public class GainfoUpdateService : IGainfoUpdateService
             var first = modifiedPersons[0];
             SapPersonItem historyPerson = null;
             var hasHistory = !string.IsNullOrWhiteSpace(first.ZWORKCODE) && lastMap.TryGetValue(first.ZWORKCODE, out historyPerson);
+            var diffType = hasHistory ? "Update" : "Insert";
             var diffMessage = hasHistory
                 ? string.Join("; ", GetFirstDiffFields(first, historyPerson))
                 : "历史记录不存在";
-            _logger.LogWarning("SAP首条差异 ZWORKCODE:{workCode}, HasHistory:{hasHistory}, Diffs:{diffs}",
-                first.ZWORKCODE, hasHistory, diffMessage);
+            _logger.LogWarning("SAP首条差异 DiffType:{diffType}, ZWORKCODE:{workCode}, HasHistory:{hasHistory}, Diffs:{diffs}",
+                diffType, first.ZWORKCODE, hasHistory, diffMessage);
         }
 
         return modifiedPersons;
@@ -599,10 +600,10 @@ public class GainfoUpdateService : IGainfoUpdateService
                 ZZ_ZD = person.ZZ_ZD,
                 Z_ZJ = person.Z_ZJ,
                 STELL = person.PLANS,//person.STELL, 20251129变更
-                STELL_NM = person.STELL_NM,
+                STELL_NM = person.STELL_NM ?? string.Empty,
                 ZLZRQ = person.ZLZRQ,
-                MASSN = person.MASSN,
-                MNTXT = person.MNTXT,
+                MASSN = person.MASSN ?? string.Empty,
+                MNTXT = person.MNTXT ?? string.Empty,
                 remark = rmk,
                 native = native,
                 sex = gender,