diff --git a/src/person_info/person_info.py b/src/person_info/person_info.py
index 639beaab8..e297f1cc6 100644
--- a/src/person_info/person_info.py
+++ b/src/person_info/person_info.py
@@ -149,6 +149,7 @@ class Person:
         if not is_person_known(person_id=self.person_id):
             self.is_known = False
             logger.warning(f"用户 {platform}:{user_id}:{person_name}:{person_id} 尚未认识")
+            self.person_name = f"未知用户{self.person_id[:4]}"
             return
         
         self.is_known = False
diff --git a/src/person_info/relationship_builder.py b/src/person_info/relationship_builder.py
index fc9908b37..f52bb8d32 100644
--- a/src/person_info/relationship_builder.py
+++ b/src/person_info/relationship_builder.py
@@ -389,6 +389,8 @@ class RelationshipBuilder:
         for person_id, segments in self.person_engaged_cache.items():
             total_message_count = self._get_total_message_count(person_id)
             person = Person(person_id=person_id)
+            if not person.is_known:
+                continue
             person_name = person.person_name or person_id
             
             if total_message_count >= max_build_threshold or (total_message_count >= 5 and (immediate_build == person_id or immediate_build == "all")):