diff --git a/ast_checker/engines/node_count.py b/ast_checker/engines/node_count.py
index 68ffa24..a68a83e 100644
--- a/ast_checker/engines/node_count.py
+++ b/ast_checker/engines/node_count.py
@@ -5,12 +5,15 @@ from ast_checker.labels import label
 class CountNodeEngine(BaseEngine):
     def _message(self, rule, count):
         target = rule["target"]
+        name = rule.get("label") or label(target)
         min_count = rule.get("min")
         max_count = rule.get("max")
+        if min_count is not None and min_count == max_count and count != min_count:
+            return rule.get("message") or f"{name} 需要出现 {min_count} 次，当前 {count} 次"
         if min_count is not None and count < min_count:
-            return rule.get("message") or f"{rule.get('label') or label(target)} 至少出现 {min_count} 次，当前 {count} 次"
+            return rule.get("message") or f"{name} 至少出现 {min_count} 次，当前 {count} 次"
         if max_count is not None and count > max_count:
-            return rule.get("message") or f"{rule.get('label') or label(target)} 至多出现 {max_count} 次，当前 {count} 次"
+            return rule.get("message") or f"{name} 至多出现 {max_count} 次，当前 {count} 次"
         return None
 
     def check(self, tree, rule, language, mapping):
@@ -22,13 +25,16 @@ class CountNodeEngine(BaseEngine):
 
     def describe(self, rule, language, mapping):
         target = rule["target"]
+        name = rule.get("label") or label(target)
         min_count = rule.get("min")
         max_count = rule.get("max")
         if rule.get("message"):
             return rule["message"]
+        if min_count is not None and min_count == max_count:
+            return f"{name} 出现 {min_count} 次"
         parts = []
         if min_count is not None:
             parts.append(f"至少 {min_count} 次")
         if max_count is not None:
             parts.append(f"至多 {max_count} 次")
-        return f"{rule.get('label') or label(target)} " + "、".join(parts)
+        return f"{name} " + "、".join(parts)