diff --git a/ast_checker/engines/function_call.py b/ast_checker/engines/function_call.py
index 09bd020..3d107a6 100644
--- a/ast_checker/engines/function_call.py
+++ b/ast_checker/engines/function_call.py
@@ -47,6 +47,9 @@ class MustNotCallFunctionEngine(_FunctionCallBase):
 class CountFunctionCallEngine(_FunctionCallBase):
     def _message(self, rule, count):
         target = rule["target"]
+        exact = rule.get("exact")
+        if exact is not None and count != exact:
+            return rule.get("message") or f"{target}() 需要调用 {exact} 次，当前 {count} 次"
         min_count = rule.get("min")
         max_count = rule.get("max")
         if min_count is not None and count < min_count:
@@ -62,13 +65,14 @@ class CountFunctionCallEngine(_FunctionCallBase):
 
     def describe(self, rule, language, mapping):
         target = rule["target"]
-        min_count = rule.get("min")
-        max_count = rule.get("max")
         if rule.get("message"):
             return rule["message"]
+        exact = rule.get("exact")
+        if exact is not None:
+            return f"{target}() 调用 {exact} 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")
+        if rule.get("min") is not None:
+            parts.append(f"至少 {rule['min']} 次")
+        if rule.get("max") is not None:
+            parts.append(f"至多 {rule['max']} 次")
         return f"{target}() " + "、".join(parts)
diff --git a/ast_checker/engines/node_count.py b/ast_checker/engines/node_count.py
index a68a83e..8aebdcb 100644
--- a/ast_checker/engines/node_count.py
+++ b/ast_checker/engines/node_count.py
@@ -4,12 +4,12 @@ from ast_checker.labels import label
 
 class CountNodeEngine(BaseEngine):
     def _message(self, rule, count):
-        target = rule["target"]
-        name = rule.get("label") or label(target)
+        name = rule.get("label") or label(rule["target"])
+        exact = rule.get("exact")
+        if exact is not None and count != exact:
+            return rule.get("message") or f"{name} 需要出现 {exact} 次，当前 {count} 次"
         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"{name} 至少出现 {min_count} 次，当前 {count} 次"
         if max_count is not None and count > max_count:
@@ -24,17 +24,15 @@ class CountNodeEngine(BaseEngine):
         return [msg] if msg else []
 
     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")
+        name = rule.get("label") or label(rule["target"])
         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"
+        exact = rule.get("exact")
+        if exact is not None:
+            return f"{name} 出现 {exact} 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")
+        if rule.get("min") is not None:
+            parts.append(f"至少 {rule['min']} 次")
+        if rule.get("max") is not None:
+            parts.append(f"至多 {rule['max']} 次")
         return f"{name} " + "、".join(parts)